Static powder spraying room safety entrance structure capable of realizing linkage alarm and mistake proofing

Abstract

The utility model discloses an electrostatic powder spraying room safe entrance structure capable of realizing linkage alarm and mistake proofing, which comprises an enclosure structure and an internal electrostatic powder spraying room, and the electrostatic powder spraying room is connected with a curing drying tunnel and extends to a workpiece discharging area. The enclosure structure is provided with an access door, and a wearing area, a verification area and an electrostatic elimination area are sequentially arranged in the enclosure structure from back to front. The three sections are respectively provided with a first access control gate, a second access control gate and a third access control gate, each area is provided with a corresponding control device, the wearing area is linked with the first access control gate through a wearing monitoring device, the verification area controls the second access control gate through a verification device, and the static elimination area operates the third access control gate through a static elimination monitoring device. According to the structure, an operator is forced to complete the processes of protective equipment wearing, identity verification and static elimination in sequence through triple access control, safety measure deficiency caused by manual operation omission is eliminated, the chain alarm mistake proofing function is achieved, and operation safety is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of safety technology for industrial coating equipment, specifically to the safe entry technology for electrostatic powder coating rooms with secondary safety points. Background Technology

[0002] Electrostatic powder coating booths are industrial equipment widely used for metal surface coating. They use high-voltage electrostatic adsorption to uniformly spray powder coating onto the workpiece surface, offering advantages such as high efficiency, environmental friendliness (no solvent evaporation), and uniform coating. In recent years, with the increasing demands for surface treatment quality in industries such as automobile manufacturing, home appliances, and hardware, the application scope of electrostatic powder coating booths has continued to expand. They are widely used in the production lines of companies such as BYD and Midea.

[0003] There are some risk factors during the use of electrostatic powder coating booths, including but not limited to the following:

[0004] 1. Fire and explosion risks

[0005] Dust flammability: Powder coatings are flammable, and dust clouds formed in the air are explosive. If an ignition source (such as static sparks, electrical malfunctions, spark discharges, etc.) is present, it may cause a fire or explosion.

[0006] Electrostatic sparks: Electrostatic powder spraying relies on electrostatic adsorption to generate electrostatic sparks, which may cause fires if not properly controlled.

[0007] 2. Static electricity discharge injury

[0008] Static electricity buildup: Excessive static electricity buildup on equipment or personnel may trigger electrostatic discharge, causing electric shock or sparks, and potentially leading to a fire.

[0009] 3. Hazards of dust inhalation

[0010] Dust inhalation: If there is no good ventilation and protective measures, the dust generated during the powder spraying process may be inhaled by the operators, affecting their respiratory health.

[0011] 4. Equipment failure and electrical safety

[0012] Electrical equipment failure: Electrostatic powder spraying equipment involves high-voltage electrostatic generators, electrical control systems, etc. If not properly maintained, there are safety risks such as leakage, short circuit, and equipment malfunction.

[0013] 5. Environmental pollution

[0014] Dust leakage: Inadequate sealing or ventilation systems may lead to dust leakage, polluting the environment and affecting the health of operators.

[0015] 6. Operational safety risks

[0016] Improper operation: If the operator does not follow the operating procedures, it may cause an accident.

[0017] In summary, the main risk factors of electrostatic powder coating rooms include fire and explosion, electrostatic discharge, electrical safety, dust inhalation, and environmental pollution.

[0018] To ensure safety, effective ventilation and explosion-proof measures should be taken, qualified equipment should be used, operating procedures should be standardized, and protective equipment should be provided.

[0019] Due to the aforementioned risk factors associated with electrostatic powder coating booths, it is necessary to take measures to prevent risks when personnel enter. Existing safe entry technologies for electrostatic powder coating booths have the following characteristics:

[0020] 1. Rely on manual supervision: Safety officers visually inspect whether operators are wearing anti-static clothing and masks.

[0021] 2. Identity verification: Some electrostatic powder coating rooms do not have access control and rely on safety personnel to verify the identity of entrants; some electrostatic powder coating rooms use card access control, but cannot verify the completeness of safety operating procedures.

[0022] 3. Independent static elimination device: A static elimination copper plate is installed at the entrance, but there is no mechanism to ensure that the person entering performs the static elimination action.

[0023] Security safeguards logic of existing technologies:

[0024] Relying on the operators' self-discipline, standard procedures are promoted through training and safety manuals, supplemented by regular spot checks, but there is no real-time mandatory intervention mechanism. Therefore, operators may violate safety regulations due to negligence, rushing to meet deadlines, or fatigue, entering the electrostatic powder coating room without wearing anti-static clothing or performing anti-static actions, thus creating safety hazards.

[0025] The biggest shortcoming of existing technologies is that they rely on manual supervision and operator self-discipline, lack a mandatory verification mechanism, and cannot eliminate potential safety hazards. Utility Model Content

[0026] The purpose of this invention is to address the biggest shortcomings of existing technologies by providing a safety entrance structure for an electrostatic powder coating room with interlocking alarms and error prevention. Through physical structure, it ensures that the entrant is authentic, properly dressed, and has performed the static electricity elimination action, thus avoiding safety risks caused by subjective factors.

[0027] To achieve the above objectives, the safety entrance structure of the electrostatic powder spraying room with interlocking alarm and error prevention of this utility model includes an enclosure structure that encloses the electrostatic powder spraying room. The electrostatic powder spraying room is connected to a curing oven, and the curing oven extends out of the enclosure structure and is connected to a loading area.

[0028] The enclosure structure is equipped with an entrance and exit, which corresponds to the electrostatic powder coating room. Taking the direction from the entrance and exit towards the electrostatic powder coating room as the forward direction, the enclosure structure is arranged from back to front as the wearing area, the verification area and the static elimination area.

[0029] A first access control gate is installed between the wearable area and the verification area, and a wearable monitoring device is installed in the wearable area to control the opening and closing of the first access control gate;

[0030] A second access control gate is installed between the verification area and the static electricity elimination area; a verification device for controlling the opening and closing of the second access control gate is installed in the verification area.

[0031] A third access gate is installed between the static elimination area and the electrostatic powder spraying room. A static elimination monitoring device is installed in the static elimination area to control the opening and closing of the third access gate.

[0032] The entrance and exit are equipped with a door magnetic sensor. The door magnetic sensor, the first access control gate, the second access control gate, the third access control gate, the wearable monitoring device, the verification device, and the static electricity monitoring device are all connected to an electrical control device. The electrical control device is connected to an internal audible and visual alarm and an external audible and visual alarm. The internal audible and visual alarm is located inside the enclosure structure, and the external audible and visual alarm is located outside the enclosure structure. The electrical control device integrates a timing module.

[0033] The wearable monitoring device includes an electrostatic protective clothing monitoring device and a dust mask monitoring device.

[0034] The clothing area is equipped with hooks for anti-static clothing and storage boxes for dust masks;

[0035] The electrostatic protective clothing monitoring device is installed on the hook of the electrostatic clothing. The electrostatic protective clothing monitoring device adopts a weight sensor, pressure sensor, capacitive proximity sensor or photoelectric sensor.

[0036] The dust mask storage box is used to store dust masks. The dust mask storage box is equipped with a dust mask monitoring device, which uses an infrared human body sensor or a pressure sensor.

[0037] When using an infrared human body sensor, the infrared human body sensor is installed at the opening of the dust mask storage box;

[0038] When using a pressure sensor, the pressure sensor is installed at the bottom of the dust mask storage box.

[0039] The verification device is a face recognition device or a card reader.

[0040] The static electricity monitoring device includes a static electricity elimination plate, which is a metal plate.

[0041] The antistatic plate consists of an upper plate and a lower plate. The lower plate is for the operator to stand on, thus creating a grounding path for the feet. The upper plate is for the hands to press to achieve more efficient static discharge. The lower plate is directly grounded, and the upper surface of the lower plate is provided with anti-slip texture.

[0042] The upper plate is grounded via a wire and connected to an electrostatic sensor. A pressure sensor for monitoring the pressing state is installed at the bottom of the upper plate. Both the pressure sensor and the electrostatic sensor are connected to the electronic control device.

[0043] The electrostatic powder coating booth is equipped with a dust concentration sensor, which is connected to an electronic control device. This invention has the following advantages:

[0044] This utility model has the following advantages:

[0045] 1. Phased mandatory verification process

[0046] By dividing the area into three zones—wearing zone, verification zone, and static electricity elimination zone—safe operation is broken down into independent steps. This ensures that operators must complete the steps of wearing protective equipment, verifying identity, and eliminating static electricity in sequence. Mandatory verification prevents human error from causing omissions in safety measures, thus ensuring safety.

[0047] The physical isolation of the first, second, and third access gates forces operators to enter the next area in sequence, preventing skipping between areas. Compared to existing technologies where the entrance to an electrostatic powder coating room lacks zoning, physical isolation, and mandatory verification, this invention significantly improves safety and avoids electrostatic hazards.

[0048] 2. Multi-level interlocking control and alarm error prevention

[0049] The monitoring system consists of a wearable monitoring device, a verification device, and an anti-static monitoring device. If any link fails to meet the standard (such as not wearing anti-static clothing correctly, identity verification failure, or excessive static electricity value), the corresponding access control gate will remain locked to prevent security risks.

[0050] 3. The layout of the entrance and exit facing the powder spraying room shortens the operation path, while three access control gates form a dynamic isolation barrier to prevent unauthorized personnel or equipment from accidentally entering high-risk areas.

[0051] 4. Modular design (three zones + access control gate) makes it easy to adapt to powder coating production lines of different sizes.

[0052] 5. Each detection step (wearing area, verification area, and static electricity elimination area) is interlocked with the electronic control device. If any step fails, the corresponding access control gate will be locked (e.g., the first access control gate will be locked) and an alarm will be activated.

[0053] 6. A tiered alarm system with coordinated internal and external response: Internal audible and visual alarms (within the building envelope) provide immediate on-site warnings (such as voice prompts and flashing lights) to alert operators to any deficiencies in their procedures. External audible and visual alarms (outside the building envelope) issue a global alarm, dispelling the misconception among those inside the building that "it's possible to pass through without following safety measures and no one will notice." If someone attempts to pass through the access control gate without following safety measures, the audible and visual alarms will continue, ensuring that safety measures are implemented.

[0054] 7. The electrostatic protective clothing monitoring device detects whether the electrostatic protective clothing has been removed by detecting changes in the load on the hooks (weight sensor) or the state of light path obstruction by the clothing (photoelectric sensor). The dust mask monitoring device detects whether the mask has been removed by human body induction or pressure induction. The electronic control device receives signals from both the electrostatic protective clothing monitoring device and the dust mask monitoring device. When both are triggered (indicating that both the electrostatic protective clothing and the dust mask have been removed), the first access control gate opens, allowing personnel to enter the verification area from the wearing area.

[0055] 8. The verification device can easily verify the identity of the person entering and ensure that the second access gate is opened only after the verification is successful.

[0056] 9. The static electricity monitoring device effectively eliminates static electricity from the human body, reducing the risk of discharge. Specifically, it uses a static electricity sensor to monitor the residual voltage on the human body in real time, ensuring that the value does not exceed 50V (the safety threshold), thereby preventing spark discharge caused by incomplete static electricity discharge. When a person simultaneously touches both the upper and lower panels, static electricity can be quickly and completely discharged, reducing the risk of electrostatic discharge. The anti-slip texture increases friction, making it more stable for the person to stand.

[0057] The upper plate of the anti-static panel is reliably grounded via a wire and equipped with a pressure sensor to monitor the contact status of personnel. When the pressure sensor is triggered, the third access control gate remains closed if the voltage detected by the electrostatic sensor is ≥50 volts. When the pressure sensor is triggered, the third access control gate opens if the voltage detected by the electrostatic sensor is <50 volts, allowing personnel to enter the access control gate, effectively preventing operational oversights. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the planar layout of this utility model.

[0059] Figure 2 This is a schematic diagram of the electrical control structure of this utility model.

[0060] In the attached drawings, the technical features corresponding to each reference numeral are: enclosure structure 1, electrostatic powder spraying chamber 2, curing oven 3, unloading area 4, entrance / exit door 5, wearing area 6, verification area 7, antistatic area 8, first access control gate 9, second access control gate 10, verification device 11, third access control gate 12, door magnetic sensor 13, electrical control device 14, internal audible and visual alarm 15, external audible and visual alarm 16, electrostatic protective clothing monitoring device 17, dust mask monitoring device 18, antistatic clothing hook 19, dust mask storage box 20, antistatic plate upper plate 21, antistatic plate lower plate 22, electrostatic sensor 23, pressing sensor 24, dust concentration sensor 25.

[0061] The main structure of the equipment includes: enclosure structure 1, electrostatic powder spraying chamber 2, curing oven 3, unloading area 4, and entrance / exit door 5.

[0062] The area is divided into: Wearing Zone 6, Verification Zone 7, and Static Electricity Elimination Zone 8;

[0063] The access control equipment includes: a first access control gate 9, a second access control gate 10, and a third access control gate 12;

[0064] The sensors and monitoring devices include: door magnetic sensor 13, electrostatic protective clothing monitoring device 17, dust mask monitoring device 18, electrostatic sensor 23, pressure sensor 24, and dust concentration sensor 25.

[0065] The control and alarm system includes: an electronic control device 14, an internal audible and visual alarm 15, and an external audible and visual alarm 16;

[0066] Other components include: verification device 11, anti-static clothing hook 19, dust mask storage box 20, upper plate of anti-static board 21, and lower plate of anti-static board 22. Detailed Implementation

[0067] like Figure 1 and Figure 2 As shown, the safety entrance structure of the electrostatic powder spraying room with interlocking alarm and error prevention of this utility model includes an enclosure structure 1, which encloses the electrostatic powder spraying room 2. The electrostatic powder spraying room 2 is connected to a curing oven 3, which extends out of the enclosure structure 1 and is connected to a lower part area 4.

[0068] The enclosure structure 1 is provided with an entrance / exit 5, which corresponds to the electrostatic powder spraying room 2; with the direction from the entrance / exit 5 to the electrostatic powder spraying room 2 as the forward direction, the enclosure structure 1 is provided with a wearing area 6, a verification area 7 and an antistatic area 8 in sequence from back to front.

[0069] A first access control gate 9 is provided between the wearable area 6 and the verification area 7. Wearable monitoring devices for controlling the opening and closing of the first access control gate 9 are provided in the wearable area 6.

[0070] A second access control gate 10 is provided between the verification area 7 and the static electricity elimination area 8; a verification device 11 for controlling the opening and closing of the second access control gate 10 is provided in the verification area 7.

[0071] A third access control gate 12 is installed between the static elimination zone 8 and the electrostatic powder spraying room 2. A static elimination monitoring device for controlling the opening and closing of the third access control gate 12 is installed in the static elimination zone 8.

[0072] By dividing the operation into three areas—wearing zone 6, verification zone 7, and static elimination zone 8—this utility model breaks down safe operation into independent steps, ensuring that operators must complete the steps of wearing protective equipment, verifying identity, and eliminating static electricity in sequence. This mandatory verification avoids human negligence that could lead to the omission of safety measures, thus ensuring safety.

[0073] The physical isolation of the first, second, and third access control gates 12 forces operators to enter the next area in sequence, preventing cross-area skipping operations. Compared with the existing technology where the entrance to the electrostatic powder spraying room 2 lacks zoning, physical isolation, and mandatory verification, this utility model significantly improves safety and avoids electrostatic hazards.

[0074] The monitoring chain is formed by wearing a monitoring device, verifying device 11, and eliminating static electricity monitoring device. If any link fails to meet the standard (such as not wearing anti-static clothing correctly, identity verification failure, or exceeding the static electricity value), the corresponding access control gate will remain locked to block security risks.

[0075] The layout of the entrance / exit 5 corresponding to the powder coating room shortens the operation path, while three access control gates form a dynamic isolation barrier to prevent unauthorized personnel or equipment from accidentally entering high-risk areas. The modular design (three areas + access control gates) makes it easy to adapt to powder coating production lines of different sizes.

[0076] A magnetic door sensor 13 is installed at entrance / exit 5. The magnetic door sensor 13, the first access control gate 9, the second access control gate 10, the third access control gate 12, the wearable monitoring device, the verification device 11, and the static electricity monitoring device are all connected to an electronic control device 14. The electronic control device 14 is connected to an internal audible and visual alarm 15 and an external audible and visual alarm 16. The internal audible and visual alarm 15 is located inside the enclosure structure 1, and the external audible and visual alarm 16 is located outside the enclosure structure 1. The electronic control device 14 integrates a timing module. The electronic control device activates the timing module after the magnetic door sensor 13 detects that entrance / exit 5 is closed. If the operator does not complete all steps within a preset time, an alarm is triggered. The electronic control device 14 can be an integrated circuit or a microcontroller. Preferably, the electronic control device 14 is connected to a display screen. The timing module is a conventional technology and is not shown in the figure.

[0077] Each detection step (wearing area 6, verification area 7, and static electricity elimination area 8) is interlocked with the electronic control device 14. If any step fails, the corresponding access control gate is locked (e.g., the first access control gate 9 is locked) and an alarm is triggered.

[0078] The system features a coordinated internal and external alarm response. The internal audible and visual alarm 15 (within the enclosure structure 1) provides immediate on-site warnings (such as flashing lights, preferably accompanied by a preset voice message) to alert operators to any deficiencies in their current procedures. The external audible and visual alarm 16 (outside the enclosure structure 1) issues a global alarm, dispelling the misconception among personnel within the enclosure structure 1 that "it's possible to pass through without taking safety precautions and no one will notice." If someone attempts to pass through the access control gate without following safety measures, the audible and visual alarm will continue, ensuring that safety measures are implemented.

[0079] The wearable monitoring device includes an electrostatic protective clothing monitoring device 17 and a dust mask monitoring device 18;

[0080] Wearing area 6 is equipped with anti-static clothing hooks 19 and dust mask storage boxes 20;

[0081] The electrostatic protective clothing monitoring device 17 is installed on the electrostatic clothing hook 19. The electrostatic protective clothing monitoring device 17 adopts a weight sensor, pressure sensor, capacitive proximity sensor or photoelectric sensor. When a photoelectric sensor is used, its transmitter and receiver are located on both sides of the electrostatic clothing hook 19, and a signal is triggered when the clothing blocks the light path.

[0082] The dust mask storage box 20 is used to store dust masks. The dust mask storage box 20 is equipped with the dust mask monitoring device 18, which adopts an infrared human body sensor or a pressure sensor.

[0083] When using an infrared human body sensor, the infrared human body sensor is installed at the opening of the dust mask storage box 20;

[0084] When a pressure sensor is used, the pressure sensor is installed at the bottom of the dust mask storage box 20.

[0085] The electrostatic protective clothing monitoring device 17 can detect whether the electrostatic protective clothing has been removed by detecting changes in the load on the electrostatic clothing hook 19 (weight sensor) or the state of the clothing blocking the light path (photoelectric sensor). The dust mask monitoring device 18 detects whether the mask has been taken off by human body sensing or pressure sensing. The electronic control device 14 receives signals from the electrostatic protective clothing monitoring device 17 and the dust mask monitoring device 18. When both are triggered (indicating that both the electrostatic protective clothing and the dust mask have been taken off), the first access control gate 9 is opened, allowing personnel to enter the verification area 7 from the wearing area 6.

[0086] The verification device 11 is a facial recognition device or a card reader. The verification device 11 can easily verify the identity of the person entering and ensure that the second access gate 10 is opened only after the verification is successful.

[0087] The static electricity monitoring device includes a static electricity elimination plate, which is a metal plate.

[0088] The antistatic plate includes an upper plate 21 and a lower plate 22. The lower plate 22 provides a foot grounding path for the operator to stand on. The upper plate 21 is used for hand pressing to achieve more efficient static discharge. The upper plate 21 is higher than the lower plate 22, and its height is designed for easy hand pressing. The lower plate 22 is directly grounded or grounded through a wire, and the upper surface of the lower plate 22 is provided with anti-slip texture.

[0089] The upper plate 21 is grounded by a wire and connected to an electrostatic sensor 23. A pressing sensor 24 for monitoring the pressing state is installed (such as embedded) at the bottom of the upper plate 21 (the pressing sensor 24 is naturally triggered when a person steps on the lower plate 22). Both the pressing sensor 24 and the electrostatic sensor 23 are connected to the electronic control device 14.

[0090] The electrostatic sensor 23 is integrated on the edge of the upper plate 21 and is connected to the electrical control device 14 by a shielded cable to reduce the impact of high-frequency electromagnetic interference (such as high-voltage electrostatic generator) in the electrostatic powder spraying room 2 on the detection accuracy.

[0091] The static electricity monitoring device effectively eliminates static electricity from the human body, reducing the risk of discharge. Specifically, the static electricity sensor 23 monitors the residual voltage on the human body in real time, ensuring that its value does not exceed 50V (the safety threshold), thereby preventing spark discharge caused by incomplete static electricity discharge. When a person simultaneously touches both the upper plate 21 and the lower plate 22, static electricity can be quickly and completely discharged, reducing the risk of electrostatic discharge. The anti-slip texture increases friction, making it more stable for the person to stand.

[0092] The upper plate 21 of the antistatic panel is reliably grounded via a wire and equipped with a pressure sensor to monitor the contact status of personnel. When the press sensor 24 is triggered, the third access control gate 12 remains closed when the voltage value detected by the electrostatic sensor 23 is ≥50 volts. When the press sensor 24 is triggered, the third access control gate 12 opens when the voltage value detected by the electrostatic sensor 23 is <50 volts, allowing personnel to enter the access control gate, effectively preventing operational oversights.

[0093] The electrostatic powder spraying chamber 2 is equipped with a dust concentration sensor 25, which is connected to the electrical control device 14.

[0094] The workflow of this utility model is as follows:

[0095] 1. Operators enter the donning area 6.

[0096] Operators enter the wearable area 6 through the access door 5 of the enclosure structure 1. The electronic control device 14 detects the door opening event through the door magnetic sensor 13. After the access door 5 closes, the timing module is triggered. If all steps are not completed until the third access gate 12 opens within a preset time (T minutes), an alarm is activated. The T value should not be too long (too inefficient and unable to provide timely warnings of abnormal situations within the enclosure structure 1) nor too short (personnel may not have completed all safety operations even if they are in good condition). A T value of 1 ≤ T ≤ 10 is preferable.

[0097] The area is equipped with anti-static clothing hooks 19 and dust mask storage boxes 20. The electronic control device 14 receives signals from the anti-static protective clothing monitoring device 17 (such as a weight sensor or photoelectric sensor) and the dust mask monitoring device 18;

[0098] ① When staff remove electrostatic protective clothing, if a weight sensor is used, its weight signal will change; if a photoelectric sensor is used, its light path obstruction state will change.

[0099] ② When staff take out the dust mask, if an infrared human body sensor is used, it will detect the movement of a human body (hand) approaching the opening of the storage box; if a pressure sensor is used, it will detect the change in weight.

[0100] After the electronic control device 14 detects that the signals of the electrostatic protective clothing monitoring device 17 and the dust mask monitoring device 18 have changed, it triggers the opening of the first access control gate 9.

[0101] 2. Authentication area 7 verification.

[0102] Operators enter the verification area 7 through the first access control gate 9 and verify their identity using a facial recognition device or card reader. The verification device 11 compares the collected fingerprint, facial, or card information with the enterprise security management system database. After successful verification, the electronic control device 14 unlocks the second access control gate 10, allowing personnel to enter the static electricity elimination area 8.

[0103] 3. Static Electricity Elimination and Detection in the Static Electricity Elimination Area 8.

[0104] The operator enters the static elimination area 8, stands on the lower plate 22 of the metal static elimination plate, and presses their hand on the upper plate 21 for at least 3 seconds (this is a requirement for personnel entering the electrostatic powder spraying room 2). The pressure sensor 24 detects the contact status of the hand. The static sensor 23 monitors the residual voltage of the human body in real time. When the voltage is ≤50V (safety threshold), the static elimination is qualified, triggering the opening of the third access control gate 12.

[0105] 4. Powder spraying booth operation and abnormal response.

[0106] Operators enter the powder coating booth through the third access gate 12 and begin the spraying operation.

[0107] The electrical control device 14 is connected to the power supply of the high-voltage electrostatic generator and the powder conveying system inside the electrostatic powder spraying room 2. If the dust concentration sensor 25 detects that the dust concentration exceeds the standard for more than 3 seconds, or if the third access gate 12 is abnormally opened (meaning someone has entered the electrostatic powder spraying room 2 without following safety procedures), the electrical control device 14 will shut down the power supply of the high-voltage electrostatic generator and the powder conveying system, suspend the powder spraying operation, and trigger the internal and external audible and visual alarms 15 and 16, prompting internal personnel to evacuate and external personnel to take emergency measures.

[0108] T minutes is the maximum passage time preset by the installation designer for personnel entering the electrostatic powder coating room 2. After T minutes (T minutes after personnel enter the enclosure structure 1), if the third access gate 12 is not triggered, the electrical control device 14 will trigger the activation of the internal audible and visual alarm 15 and the external audible and visual alarm 16 to prevent abnormalities from occurring inside the enclosure structure 1 that are unknown to the outside world.

[0109] This invention upgrades the traditional manual safety process to automated mandatory verification, effectively reducing the risk of dust explosions or electric shocks caused by operational negligence, and is very suitable for electrostatic powder spraying booths.

[0110] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A safety entrance structure for an electrostatic powder coating booth with interlocking alarm and error prevention features, including an enclosure structure, characterized in that: The enclosure structure encloses the electrostatic powder spraying room, which is connected to a curing tunnel. The curing tunnel extends out of the enclosure structure and is connected to the unloading area. The enclosure structure is equipped with an entrance and exit, which corresponds to the electrostatic powder coating room. Taking the direction from the entrance and exit towards the electrostatic powder coating room as the forward direction, the enclosure structure is arranged from back to front as the wearing area, the verification area and the static elimination area. A first access control gate is installed between the wearable area and the verification area, and a wearable monitoring device is installed in the wearable area to control the opening and closing of the first access control gate; A second access control gate is installed between the verification area and the static electricity elimination area; a verification device for controlling the opening and closing of the second access control gate is installed in the verification area. A third access gate is installed between the static elimination area and the electrostatic powder spraying room. A static elimination monitoring device is installed in the static elimination area to control the opening and closing of the third access gate.

2. The electrostatic powder coating room safety entrance structure with interlocking alarm and error prevention as described in claim 1, characterized in that: The entrance and exit are equipped with a door magnetic sensor. The door magnetic sensor, the first access control gate, the second access control gate, the third access control gate, the wearable monitoring device, the verification device, and the static electricity monitoring device are all connected to an electrical control device. The electrical control device is connected to an internal audible and visual alarm and an external audible and visual alarm. The internal audible and visual alarm is located inside the enclosure structure, and the external audible and visual alarm is located outside the enclosure structure. The electrical control device integrates a timing module.

3. The electrostatic powder coating room safety entrance structure with interlocking alarm and error prevention as described in claim 2, characterized in that: The wearable monitoring device includes an electrostatic protective clothing monitoring device and a dust mask monitoring device. The clothing area is equipped with hooks for anti-static clothing and storage boxes for dust masks; The electrostatic protective clothing monitoring device is installed on the hook of the electrostatic clothing. The electrostatic protective clothing monitoring device adopts a weight sensor, pressure sensor, capacitive proximity sensor or photoelectric sensor. The dust mask storage box is used to store dust masks. The dust mask storage box is equipped with a dust mask monitoring device, which uses an infrared human body sensor or a pressure sensor. When using an infrared human body sensor, the infrared human body sensor is installed at the opening of the dust mask storage box; When using a pressure sensor, the pressure sensor is installed at the bottom of the dust mask storage box.

4. The electrostatic powder coating room safety entrance structure with interlocking alarm and error prevention as described in claim 2, characterized in that: The verification device is a face recognition device or a card reader.

5. The electrostatic powder coating room safety entrance structure with interlocking alarm and error prevention as described in claim 2, characterized in that: The static electricity monitoring device includes a static electricity elimination plate, which is a metal plate. The antistatic plate consists of an upper plate and a lower plate. The lower plate is for the operator to stand on, thus creating a grounding path for the feet. The upper plate is for the hands to press to achieve more efficient static discharge. The lower plate is directly grounded, and the upper surface of the lower plate is provided with anti-slip texture. The upper plate is grounded via a wire and connected to an electrostatic sensor. A pressure sensor for monitoring the pressing state is installed at the bottom of the upper plate. Both the pressure sensor and the electrostatic sensor are connected to the electronic control device.

6. The electrostatic powder coating room safety entrance structure with interlocking alarm and error prevention as described in claim 1, characterized in that: The electrostatic powder spraying room is equipped with a dust concentration sensor, which is connected to an electrical control device.

Images