A hand clamping safety protection device for plate and frame filter press
By using a laser beam fence and a high-pressure airflow system on a plate and frame filter press, dust interference can be monitored and eliminated in real time, creating both active and passive protection. This solves the problems of hand pinching accidents and false alarms in dusty environments, and improves the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI BEIYUAN CHEM GROUP
- Filing Date
- 2025-07-03
- Publication Date
- 2026-05-29
AI Technical Summary
In dusty environments, traditional infrared sensors and laser detection systems are easily interfered with by tiny particles, leading to frequent hand-clamping accidents and a high false alarm rate in plate and frame filter presses, especially in humid and dusty conditions.
The laser fence, consisting of a laser emitter and receiver, works in conjunction with high-pressure airflow to form a physical barrier. The laser fence monitors human intrusion in real time, while the high-pressure airflow removes floating debris, creating a safety system that combines active and passive protection to eliminate the risk of fingers being pinched and reduce false alarms.
Significantly reduces the incidence of hand pinching accidents and improves the accuracy of equipment alarms. Suitable for plate and frame filter presses in humid and dusty conditions.
Smart Images
Figure CN224292620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plate and frame filter press technology, and in particular to a safety protection device for preventing hand pinching in plate and frame filter presses. Background Technology
[0002] The filter press currently used in the wet acetylene process is a plate and frame filter press. The filtered filter cake has high viscosity and strong adhesion, so it needs to be cleaned manually. During the cleaning process, the pull rope needs to be pulled to stop the plate puller before cleaning. In actual use, due to the high failure rate of the pull rope switch and the frequent pulling of the rope, personnel often clean the filter cake while the plate puller is still running, which can easily cause arm injuries.
[0003] When a plate and frame filter press is in use, the mechanical action of the filter plates closing and assembling poses significant operational safety hazards. Traditional safety protection devices for filter presses mostly use mechanical limit switches or infrared beam sensors. However, these technologies have inherent defects. Mechanical switches are prone to failure due to long-term mechanical wear and have a delayed response. Although infrared sensors can achieve non-contact detection, in humid and dusty conditions, tiny particles in the air, such as dust and water mist, will strongly scatter and absorb the infrared beam, leading to signal attenuation or false triggering. Especially during the dynamic process of the filter plates closing, a sudden increase in dust concentration can directly cause the detection system to misjudge, resulting in unplanned equipment shutdown or failure of safety interlocks. Such problems are particularly prominent in typical application scenarios such as mine tailings treatment and chemical sludge dewatering. Due to the high moisture content of the materials and the open working environment, the interference of mixed suspended particles of dust and water mist on the beam transmission channel increases exponentially, leading to an increased false alarm rate of traditional photoelectric detection systems and severely restricting the continuous operation capability of the equipment.
[0004] Therefore, to address the issue that in dusty environments, tiny particles can scatter and interfere with the laser beam, making it difficult to prevent hand-pinching accidents while eliminating false alarms in the laser detection system, a hand-pinching safety protection device for plate and frame filter presses can be designed. When the plate and frame filter press is in use, this device, through a laser fence, can cover the entire stroke range of the filter press. With a distributed layout, it achieves all-round protection from the edge of the filter plate to the operating surface, eliminating the blind spots of traditional mechanical limit devices. At the same time, the spiral guide structure allows the airflow coverage to be adjusted with air pressure, which can both form a local strong airflow to remove stubborn dirt and reduce energy consumption to maintain continuous cleanliness, adapting to working environments with different pollution levels. This device achieves real-time human intrusion detection through the laser beam fence, and forms a physical barrier with high-pressure airflow, constructing a safety system that combines active monitoring and passive protection, minimizing the incidence of hand-pinching accidents. Meanwhile, the vortex airflow system effectively solves the problem of false alarms in dusty environments, and is particularly suitable for the humid and dusty working conditions common in filter presses, thereby improving the accuracy of equipment alarms. Utility Model Content
[0005] To overcome the problem that infrared sensors can achieve non-contact detection during the use of plate and frame filter presses, but in dusty environments, tiny particles can cause scattering interference to the light beam, making it difficult to prevent hand pinching accidents and eliminating false alarms from laser detection systems.
[0006] The technical solution of this utility model is as follows: a safety protection device for preventing hand pinching in a plate and frame filter press, comprising a filter press body, a control cabinet, mounting columns, a laser emitter, a laser receiver, a high-pressure air pump, a high-pressure air pipe, a high-pressure nozzle, a bracket, a guide cylinder, spiral blades, and a frustum-shaped guide pipe. The control cabinet is located on the left side of the filter press body. Mounting columns are located at the top of both the left and right ends of the filter press body. A laser emitter and a laser receiver are respectively mounted on the opposite side of the mounting column and another mounting column on the same side. A high-pressure air pump is fixedly mounted on the outer wall of the right mounting column. A high-pressure air pipe is located at the front end of the high-pressure air pump. A high-pressure nozzle is located at the front end of the high-pressure air pipe. A bracket is fixedly mounted on the top inner wall of the right mounting column. A guide cylinder is fixedly mounted at the top front end of the bracket. The guide cylinder is located in front of the high-pressure nozzle. Spiral blades are fixedly mounted inside the guide cylinder. A frustum-shaped guide pipe is fixedly mounted at the front end of the guide cylinder.
[0007] Preferably, when the plate and frame filter press is in use, symmetrically arranged laser emitters and receivers at the top of the mounting columns on both the left and right ends of the filter press body constitute the core detection system. The laser emitters continuously emit directional beams. After the beams pass through the working area of the filter press, they are precisely captured by the symmetrically positioned laser receivers, forming an invisible laser beam barrier. This barrier acts like a virtual barrier, monitoring the integrity of the beam path in real time. When an operator's limb or a foreign object enters the working area of the filter press, it will inevitably block the laser beam. Once the laser receiver detects light intensity attenuation or light path interruption, it immediately sends a trigger signal to the control system. The control system immediately cuts off the power supply to the filter press, forcibly stopping the filter plate closing action, thus eliminating the risk of pinching hands at the source. At the same time, the high-pressure air pump is started to draw in ambient air and pressurize and deliver it. When the high-pressure gas is delivered to the high-pressure nozzle through the high-pressure air pipe, it will encounter a specially designed guide structure and be fixed in place. The guide tube in front of the nozzle is equipped with spiral blades. When the high-pressure airflow passes through the spiral blades, it is forced to rotate. After leaving the guide tube, this rotating airflow is further transformed into a vortex airflow extending along the beam axis by the guiding effect of the front frustum guide tube. This spiral air curtain can not only effectively remove dust, water mist and other floating objects on the beam path and maintain the cleanliness of the laser transmission channel, but also reduce the scattering interference of small particles on the beam through airflow disturbance, thereby significantly improving the anti-interference capability of the laser detection system. The device realizes real-time human intrusion detection through laser beam fence, and forms a physical barrier with high-pressure airflow, building a safety system that combines active monitoring and passive protection, minimizing the incidence of hand pinching accidents. At the same time, the vortex airflow system effectively solves the problem of false alarms in dusty environments, and is particularly suitable for the humid and dusty working conditions common in filter presses, thereby improving the alarm accuracy of the equipment.
[0008] Preferably, the top inner wall of the mounting column is provided with a storage component, which includes a storage cavity and a storage box. The upper inner wall of the mounting column is provided with a storage cavity, and a storage box is slidably arranged inside the storage cavity. Multiple sets of storage boxes are provided, with the laser emitter located inside one set of storage boxes and the laser receiver located inside another set of storage boxes.
[0009] Preferably, the storage component also includes a through hole and a handle. The front side wall of the storage box has a through hole, and the front side wall of the storage box is fixedly provided with a handle.
[0010] Preferably, the inner bottom wall of the storage cavity is provided with two sets of guide grooves, a guide rod is fixedly installed inside the guide groove, a guide block is provided on the side wall of the guide rod, the guide block is slidably connected to the guide rod, and the top of the guide block is fixedly connected to the rear end of the bottom wall of the storage box.
[0011] Preferably, a guide frame is fixedly installed on the top side wall of the mounting column, and a locking rod is installed inside the guide frame, which is slidably connected to the guide frame.
[0012] Preferably, a locking block is fixedly installed at the top front end of the storage box, and a locking hole is opened through the inside of the locking block, with the lower end of the locking rod engaging with the inside of the locking hole.
[0013] Preferably, a limit ring is fixedly provided on the lower side wall of the locking rod, and a locking spring is fixedly provided above the limit ring, with the upper end of the locking spring fixedly connected to the inner wall of the guide frame.
[0014] The beneficial effects of this utility model are:
[0015] When a plate and frame filter press is in use, symmetrically arranged laser emitters and receivers at the top of the mounting columns on both the left and right sides of the press body constitute the core detection system. The laser emitters continuously emit directional beams, which, after passing through the working area of the filter press, are precisely captured by the symmetrically positioned laser receivers, forming an invisible laser beam barrier. This barrier acts like a virtual barrier, monitoring the integrity of the beam path in real time. When an operator's limb or a foreign object enters the filter press's working area, it will inevitably block the laser beam. Once the laser receiver detects a decrease in light intensity or an interruption in the light path, it immediately sends a trigger signal to the control system. The control system immediately cuts off the filter press's power supply, forcibly stopping the filter plates from closing, thus eliminating the risk of pinching hands. At the same time, the high-pressure air pump is started to draw in ambient air and pressurize it for delivery. When the high-pressure gas is delivered to the high-pressure nozzle through the high-pressure air pipe, it encounters a specially designed guide structure and is fixed to the nozzle. The guide tube at the front is equipped with spiral blades. When the high-pressure airflow passes through the spiral blades, it is forced to rotate. After leaving the guide tube, this rotating airflow is further transformed into a vortex airflow extending along the beam axis by the guiding effect of the front frustum guide tube. This spiral air curtain can not only effectively remove dust, water mist and other floating objects on the beam path and maintain the cleanliness of the laser transmission channel, but also reduce the scattering interference of small particles on the beam through airflow disturbance, thereby significantly improving the anti-interference capability of the laser detection system. The device realizes real-time human intrusion detection through laser beam fence, and forms a physical barrier with high-pressure airflow, building a safety system that combines active monitoring and passive protection, minimizing the incidence of hand pinching accidents. At the same time, the vortex airflow system effectively solves the problem of false alarms in dusty environments, and is particularly suitable for the humid and dusty working conditions common in filter presses, thereby improving the alarm accuracy of the equipment. Attached Figure Description
[0016] Figure 1 The diagram shown is a first three-dimensional structural schematic of a plate and frame filter press anti-pinch safety protection device according to the present invention.
[0017] Figure 2 The diagram shown is a three-dimensional structural diagram of the top right side of the filter press body, which is a plate and frame filter press anti-pinch safety protection device according to this utility model.
[0018] Figure 3 What is shown is Figure 1 Schematic diagram of the three-dimensional structure at the circled mark;
[0019] Figure 4 What is shown is Figure 2 Schematic diagram of the three-dimensional structure at the circled mark;
[0020] Figure 5 The diagram shown is a three-dimensional structural diagram of the first outer periphery of a storage box for a plate and frame filter press anti-pinch safety protection device according to this utility model.
[0021] Figure 6 The diagram shown is a three-dimensional structural diagram of the first peripheral part of a high-pressure air pump for an anti-pinch safety protection device for a plate and frame filter press according to this utility model.
[0022] Explanation of reference numerals in the attached drawings: 1. Filter press body; 2. Mounting column; 3. Laser emitter; 4. Laser receiver; 5. High-pressure air pump; 6. High-pressure air pipe; 7. High-pressure nozzle; 8. Support; 9. Guide cylinder; 10. Spiral blade; 11. Frustum-shaped guide pipe; 12. Storage chamber; 13. Storage box; 14. Handle; 15. Through hole; 16. Guide groove; 17. Guide rod; 18. Guide block; 19. Guide frame; 20. Locking rod; 21. Locking hole; 22. Locking block; 23. Locking spring; 24. Limit ring; 25. Control cabinet. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] Please see Figure 1 and Figure 6 This utility model provides an embodiment of a plate and frame filter press anti-pinch safety protection device, including a filter press body 1, a control cabinet 25, mounting columns 2, a laser emitter 3, a laser receiver 4, a high-pressure air pump 5, a high-pressure air pipe 6, a high-pressure nozzle 7, a bracket 8, a guide cylinder 9, a spiral blade 10, and a frustum-shaped guide pipe 11. The control cabinet 25 is located on the left side of the filter press body 1. Mounting columns 2 are located at the top of both the left and right ends of the filter press body 1. A laser emitter 3 and a laser receiver 4 are respectively mounted on the opposite side of the mounting column 2 and another mounting column 2 on the same side. A high-pressure air pipe 6 is located at the front end of the high-pressure air pump 5. A high-pressure nozzle 7 is located at the front end of the high-pressure air pipe 6. A bracket 8 is fixedly installed on the top inner wall of the right mounting column 2. A guide cylinder 9 is fixedly installed at the top front end of the bracket 8. The guide cylinder 9 is located in front of the high-pressure nozzle 7. A spiral blade 10 is fixedly installed inside the guide cylinder 9. A frustum-shaped guide pipe 11 is fixedly installed at the front end of the guide cylinder 9.
[0025] Please see Figure 2 and Figure 5The top inner wall of the mounting column 2 is provided with a storage assembly, which includes a storage cavity 12 and a storage box 13. The upper inner wall of the mounting column 2 has a storage cavity 12, and the storage box 13 is slidably disposed inside the storage cavity 12. Multiple sets of storage boxes 13 are provided. The laser emitter 3 is disposed inside one set of storage boxes 13, and the laser receiver 4 is disposed inside another set of storage boxes 13. The laser emitter 3 and the laser receiver 4 can be installed separately through multiple sets of storage boxes 13. The storage assembly also includes a through hole 15 and a handle 14. The front of the storage box 13... A through hole 15 is provided through the end side wall. A handle 14 is fixedly provided on the front side wall of the storage box 13. By pulling outward with the handle 14, the storage box 13 can be smoothly slid out along the storage cavity 12. Two sets of guide grooves 16 are provided on the inner bottom wall of the storage cavity 12. A guide rod 17 is fixedly provided inside the guide groove 16. A guide block 18 is provided on the side wall of the guide rod 17. The guide block 18 is slidably connected to the guide rod 17. The top of the guide block 18 is fixedly connected to the rear end of the bottom wall of the storage box 13. The cooperation between the guide block 18 and the guide rod 17 ensures the straightness of the pull-out process.
[0026] Please see Figure 3 and Figure 4 A guide frame 19 is fixedly installed on the top side wall of the mounting column 2. A locking rod 20 is installed inside the guide frame 19. The locking rod 20 is slidably connected to the guide frame 19. The locking rod 20 is slidably adjusted through the guide frame 19. A locking block 22 is fixedly installed on the top front end of the storage box 13. A locking hole 21 is opened through the inside of the locking block 22. The lower end of the locking rod 20 is engaged with the inside of the locking hole 21. Pulling the locking rod 20 upward will disengage the lower end of the locking rod 20 from the locking hole 21 of the storage box 13. At this time, the storage box 13 is unlocked. A limit ring 24 is fixedly installed on the lower side wall of the locking rod 20. A locking spring 23 is fixedly installed above the limit ring 24. The upper end of the locking spring 23 is fixedly connected to the inner wall of the guide frame 19. Pushing it in the opposite direction will automatically reset the locking mechanism. The locking mechanism is re-locked under the action of the spring.
[0027] When the plate and frame filter press is in use, the laser emitters 3 and laser receivers 4, which are symmetrically arranged on the top of the mounting columns 2 at both ends of the filter press body 1, constitute the core detection system. The laser emitters 3 continuously emit directional beams. After the beams pass through the working area of the filter press, they are accurately captured by the laser receivers 4 in symmetrical positions, forming an invisible laser beam fence. This fence is like a virtual barrier, which monitors the integrity of the beam path in real time.
[0028] When an operator's limbs or foreign objects enter the filter press's operating area, they will inevitably block the laser beam. Once the laser receiver 4 detects light intensity attenuation or optical path interruption, it immediately sends a trigger signal to the control system. The control system immediately cuts off the filter press's power supply and forcibly stops the filter plate closing action, eliminating the risk of pinching hands from the root.
[0029] Simultaneously, the high-pressure air pump 5 is activated to begin drawing in ambient air and pressurizing it for delivery. When the high-pressure gas is delivered to the high-pressure nozzle 7 via the high-pressure air pipe 6, it encounters a specially designed flow guiding structure. The guide cylinder 9, fixed in front of the nozzle, is equipped with spiral blades 10. When the high-pressure airflow passes through the spiral blades 10, it is forced to rotate. After leaving the guide cylinder 9, this rotating airflow is further transformed into a vortex airflow extending along the beam axis by the guiding effect of the front frustum flow guide pipe 11. This spiral air curtain can not only effectively remove dust, water mist and other floating objects on the beam path and maintain the cleanliness of the laser transmission channel, but also reduce the scattering interference of small particles on the beam through airflow disturbance, thereby significantly improving the anti-interference capability of the laser detection system.
[0030] When the laser emitter 3 or receiver needs to be repaired, the operator only needs to pull the locking rod 20 upward to overcome the elastic force of the locking spring 23, so that the lower end of the locking rod 20 disengages from the locking hole 21 of the storage box 13. At this time, the storage box 13 is unlocked. By pulling it outward with the handle 14, the storage box 13 can be smoothly slid out along the guide groove 16. The cooperation between the guide block 18 and the guide rod 17 ensures the straightness of the pulling process. After the storage box 13 is completely pulled out, the internal components can be maintained or replaced. After completion, it can be automatically reset by pushing it in the opposite direction. The locking mechanism is re-locked under the action of the spring.
[0031] This device uses a laser fence to cover the entire travel range of the filter press. Combined with the distributed layout of multiple storage boxes 13, it achieves all-round protection from the edge of the filter plate to the operating surface, eliminating the blind spots of traditional mechanical limit devices. At the same time, the spiral guide structure allows the airflow coverage to be adjusted with air pressure, which can form a strong local airflow to remove stubborn dirt, and also reduce energy consumption to maintain continuous cleanliness, adapting to working environments with different pollution levels. The device uses a laser beam fence to achieve real-time human intrusion detection, and forms a physical barrier with high-pressure airflow, building a safety system that combines active monitoring and passive protection, minimizing the incidence of hand pinching accidents. Meanwhile, the vortex airflow system effectively solves the problem of false alarms in dusty environments, and is particularly suitable for the humid and dusty working conditions common in filter presses, thereby improving the accuracy of equipment alarms.
[0032] Through the above steps, when the plate and frame filter press is in use, the laser emitters 3 and laser receivers 4, symmetrically arranged on the top of the mounting columns 2 at both ends of the filter press body 1, constitute the core detection system. The laser emitters 3 continuously emit directional beams. After the beams pass through the working area of the filter press, they are precisely captured by the symmetrically positioned laser receivers 4, forming an invisible laser beam barrier. This barrier acts like a virtual barrier, monitoring the integrity of the beam path in real time. When an operator's limbs or foreign objects enter the working area of the filter press, they will inevitably block the laser beam. Once the laser receiver 4 detects light intensity attenuation or light path interruption, it immediately sends a trigger signal to the control system. The control system immediately cuts off the power supply to the filter press, forcibly stopping the filter plate closing action, thus eliminating the risk of pinching hands at the source. At the same time, the high-pressure air pump 5 is started to draw in ambient air and pressurize and deliver it. When the high-pressure gas is delivered to the high-pressure nozzle 7 through the high-pressure air pipe 6, it will encounter a specially designed guide structure. The guide cylinder 9, fixed in front of the nozzle, is equipped with spiral blades 10. When the high-pressure airflow passes through the spiral blades 10, it is forced to rotate. After leaving the guide cylinder 9, this rotating airflow is further transformed into a vortex airflow extending along the beam axis by the guiding effect of the front frustum guide tube 11. This spiral air curtain can not only effectively remove dust, water mist and other floating objects on the beam path and maintain the cleanliness of the laser transmission channel, but also reduce the scattering interference of small particles on the beam through airflow disturbance, thereby significantly improving the anti-interference capability of the laser detection system. The device realizes real-time human intrusion detection through laser beam fence, and forms a physical barrier with high-pressure airflow, building a safety system that combines active monitoring and passive protection, minimizing the incidence of hand pinching accidents. At the same time, the vortex airflow system effectively solves the problem of false alarms in dusty environments, and is particularly suitable for the humid and dusty working conditions common in filter presses, thereby improving the alarm accuracy of the equipment.
[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A safety protection device for preventing hand pinching in a plate and frame filter press, comprising a filter press body (1), characterized in that: It also includes a control cabinet (25), mounting columns (2), a laser emitter (3), a laser receiver (4), a high-pressure air pump (5), a high-pressure air pipe (6), a high-pressure nozzle (7), a bracket (8), a guide cylinder (9), spiral blades (10), and a frustum guide pipe (11). The control cabinet (25) is located on the left side of the filter press body (1). Mounting columns (2) are located at the top of both the left and right ends of the filter press body (1). A laser emitter (3) and a laser receiver (4) are respectively mounted on the opposite side of the mounting column (2) and another mounting column (2) on the same side. 4) A high-pressure air pump (5) is fixedly installed on the outer wall of the right mounting column (2). A high-pressure air pipe (6) is installed at the front end of the high-pressure air pump (5). A high-pressure nozzle (7) is installed at the front end of the high-pressure air pipe (6). A bracket (8) is fixedly installed on the top inner wall of the right mounting column (2). A guide cylinder (9) is fixedly installed at the top front end of the bracket (8). The guide cylinder (9) is located in front of the high-pressure nozzle (7). A spiral blade (10) is fixedly installed inside the guide cylinder (9). A frustum guide pipe (11) is fixedly installed at the front end of the guide cylinder (9).
2. The anti-pinch safety protection device for a plate and frame filter press according to claim 1, characterized in that: The top inner wall of the mounting column (2) is provided with a storage component, which includes a storage cavity (12) and a storage box (13). The upper inner wall of the mounting column (2) is provided with a storage cavity (12), and a storage box (13) is slidably arranged inside the storage cavity (12). There are multiple sets of storage boxes (13). The laser emitter (3) is located inside one set of storage boxes (13), and the laser receiver (4) is located inside another set of storage boxes (13).
3. The anti-pinch safety protection device for a plate and frame filter press according to claim 2, characterized in that: The storage component also includes a through hole (15) and a handle (14). The front side wall of the storage box (13) has a through hole (15) and a handle (14) is fixedly provided on the front side wall of the storage box (13).
4. The anti-pinch safety protection device for a plate and frame filter press according to claim 2, characterized in that: The inner bottom wall of the storage cavity (12) is provided with two sets of guide grooves (16). A guide rod (17) is fixedly installed inside the guide groove (16). A guide block (18) is provided on the side wall of the guide rod (17). The guide block (18) is slidably connected to the guide rod (17). The top of the guide block (18) is fixedly connected to the rear end of the bottom wall of the storage box (13).
5. A safety protection device for preventing hand pinching in a plate and frame filter press according to claim 2, characterized in that: A guide frame (19) is fixedly installed on the top side wall of the mounting column (2). A locking rod (20) is installed inside the guide frame (19). The locking rod (20) is slidably connected to the guide frame (19).
6. The anti-pinch safety protection device for a plate and frame filter press according to claim 5, characterized in that: A locking block (22) is fixedly installed at the top front end of the storage box (13). A locking hole (21) is opened through the inside of the locking block (22). The lower end of the locking rod (20) is engaged with the inside of the locking hole (21).
7. A plate and frame filter press anti-pinch safety protection device according to claim 5, characterized in that: A limit ring (24) is fixedly installed on the lower side wall of the locking rod (20), and a locking spring (23) is fixedly installed above the limit ring (24). The upper end of the locking spring (23) is fixedly connected to the inner wall of the guide frame (19).