Explosion-proof door bucket

Abstract

The utility model relates to the technical field of anti-explosion devices, and discloses an anti-explosion door bucket which comprises a door bucket arranged between an anti-explosion area and a non-anti-explosion area, the door bucket is divided into a door bucket area I and a door bucket area II, the door bucket area I is provided with a pressure difference sensor used for collecting the air pressure difference between the anti-explosion area and the door bucket area I in real time, and the door bucket area I is further provided with at least one air supply outlet. The air supply outlet is connected with a fan through an air duct, an adjusting valve is arranged on the air duct, and the microprocessor is electrically connected with the differential pressure sensor, the fan and the adjusting valve. The microprocessor dynamically adjusts the fan and / or the adjusting valve according to data collected by the differential pressure sensor in real time so that the air pressure difference between the anti-explosion area and the door bucket I area can be kept at the preset pressure difference. According to the scheme, automatic real-time monitoring and dynamic control adjustment can be met through structural optimization, and the pressure difference is kept stable in real time; the fan and the adjusting valve can flexibly configure adjusting and controlling means, and the adjusting speed and precision requirements are met; under the condition that stable pressure difference is maintained in the door bucket I area, a reinforced isolation area is formed through the door bucket II area, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof devices, in particular to an explosion-proof door compartment. Background Art

[0002] An explosion-proof portal is a safety feature used in industrial production and architectural design to prevent the spread of explosion accidents. It is typically installed in the transition zone between the explosion-proof zone (where flammable or explosive gases or dust are present) and the non-explosion-proof zone (where no flammable or explosive risks exist). It effectively isolates the explosion-proof zone from the non-explosion-proof zone, preventing the spread of combustible gases that may leak from the explosion-proof zone to the non-explosion-proof zone, thereby protecting personnel and equipment. During normal use, a stable pressure differential must be maintained between the explosion-proof zone and the portal.

[0003] Currently, explosion-proof door vents use fans to supply air. The fan speed can be adjusted using a frequency converter (VFD), with a manual VFD control switch located at the door. Under normal circumstances, the fan delivers air evenly, maintaining a stable pressure differential between the explosion-proof area and the door vent. However, when personnel frequently enter and exit the vent, the pressure inside the vent can fluctuate significantly within a short period of time, posing a risk of flammable gases leaking from the explosion-proof area. If the appropriate pressure differential is not quickly restored, the pressure inside the vent can become excessively high, compromising its overall airtightness.

[0004] The existing solution to this problem is to rely on personnel manually increasing the inverter speed at the explosion-proof door to quickly restore the appropriate pressure differential. Once the pressure differential is quickly restored, the inverter speed must be manually reduced again, ultimately adjusting the fan speed to a speed that maintains a stable pressure differential. This entire adjustment process requires manual intervention, posing safety risks. The effectiveness of the adjustment is affected by personnel experience and technical capabilities, and repeated adjustments may be necessary if not performed correctly on the first try. This results in unstable airflow, prolonged pressure differential fluctuations, and an inability to quickly and accurately achieve a stable state. Utility Model Content

[0005] The utility model is intended to provide an explosion-proof door compartment, which is used to solve the technical problem that the manual operation mode of maintaining a stable pressure difference in the existing explosion-proof door compartment is inaccurate and unsafe.

[0006] The basic solution provided by the present invention is: an explosion-proof door vestibule, comprising a door vestibule arranged between an explosion-proof zone and a non-explosion-proof zone, the door vestibule being used to divide the explosion-proof zone into door vestibule zone I, and the explosion-proof zone into door vestibule zone II, and a door is staggeredly arranged between the explosion-proof zone and door vestibule zone I, between door vestibule zone I and door vestibule zone II, and between door vestibule zone II and the non-explosion-proof zone; a pressure differential sensor for real-time acquisition of air pressure differential data between the explosion-proof zone and door vestibule zone I is arranged in the door vestibule zone I; at least one air supply outlet is also arranged in the door vestibule zone I, the air supply outlet is connected to a fan for providing fresh air through a ventilation duct, wherein the fan has a frequency converter and a regulating valve is arranged on the ventilation duct; and a microprocessor electrically connected to the pressure differential sensor, the frequency converter and the regulating valve is further included, wherein the microprocessor dynamically adjusts the frequency converter and / or the regulating valve using the pressure differential data collected in real time by the pressure differential sensor to keep the air pressure differential between the explosion-proof zone and door vestibule zone I within a preset pressure differential range.

[0007] The working principle and advantages of the utility model are: by adding a pressure differential sensor, intelligent real-time monitoring of the pressure difference inside and outside the explosion-proof zone can be realized, the data collected by the pressure differential sensor in real time is calculated and judged by the microprocessor in real time, and the fan and regulating valve are automatically adjusted according to the judgment result, so that the pressure difference between the explosion-proof zone and the door lobby I zone is dynamically stabilized within the preset pressure differential range, ensuring the safety and stability of the production environment.

[0008] Compared with the existing technology, this solution introduces automated real-time monitoring and dynamic control adjustment based on pressure differential sensors and microprocessors to replace the existing manual operation, and intelligently maintains real-time stability of the pressure differential. The entire process does not require human participation, and can achieve fast and precise adjustment, thereby improving production safety and efficiency. At the same time, fans and regulating valves are set to form a combination function of coarse adjustment and fine adjustment, making the overall control means more flexible. In different situations where the pressure difference is large or small, and the pressure difference changes fast or slow, not only can targeted and rapid adjustment be made, but the pressure difference can also be maintained at a higher pressure difference value, which meets both the requirements of adjustment speed and adjustment accuracy. In addition, the door lobby is divided into door lobby area I and door lobby area II. While maintaining a stable pressure differential in door lobby area I, door lobby area II is used to form a reinforced isolation area to improve safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of the structure of an explosion-proof door provided by an embodiment of the utility model Figure 1 ;

[0010] Figure 2 A schematic diagram of the structure of an explosion-proof door provided by an embodiment of the utility model Figure 2 . DETAILED DESCRIPTION

[0011] The following is a further detailed description through specific implementation methods:

[0012] The symbols in the drawings of the specification include: door lobby 1, pressure difference sensor 2, ventilation duct 3, fan 4, regulating valve 5, door 6.

[0013] Example 1

[0014] Basically as attached Figure 1 and Figure 2 As shown: An explosion-proof door vestibule includes a door vestibule 1 arranged between an explosion-proof area and a non-explosion-proof area. The door vestibule 1 is used to divide the explosion-proof area into a door vestibule area I, and the explosion-proof area and the non-explosion-proof area into a door vestibule area II. The door vestibule 1 is used to divide the door vestibule area into door vestibule area I and door vestibule area II. While maintaining a stable pressure difference in door vestibule area I, door vestibule area II is used to form a reinforced isolation area to improve safety protection.

[0015] A door 6 is staggered between the explosion-proof area and the door lobby area I, between the door lobby area I and the door lobby area II, and between the door lobby area II and the non-explosion-proof area. The staggering method can be as follows: Figure 1 As shown, the door between the vestibule area I and the vestibule area II is staggered with the other two doors, and the other two doors are set in the same position to meet the buffering effect when an explosion occurs.

[0016] A pressure differential sensor 2 is provided in the vestibule area I for real-time collection of pressure differential data between the explosion-proof area and the vestibule area I. The installation position can be 1.8-2m from the ground. It uses an explosion-proof product and can accurately collect pressure differential data between the explosion-proof area and the vestibule area I.

[0017] At least one air outlet is also provided in the vestibule area I. The air outlet can be located at the top of the vestibule area I. The air outlet is connected to a fan 4 via a ventilation duct 3. The fan 4 is a high-efficiency and energy-saving axial flow fan. A centrifugal fan can also be selected according to actual needs and space conditions. The fan is provided with a frequency converter, which is electrically connected to a microprocessor and can adjust the fan's air output based on relevant instructions sent to the frequency converter by the microprocessor. The air inlet of the fan is equipped with a filter assembly, which can be a filter mesh, used to filter dust, impurities, etc. in the outside air, protect the fan and maintain air quality, ensure the cleanliness of the incoming air, reduce the maintenance frequency of internal equipment, and extend its service life.

[0018] The ventilation duct 3 is equipped with a regulating valve 5. This valve can be electrically operated for ease of installation and precise control. It can be set to open and close at a rate of full opening and closing within 10 seconds. This speed is particularly important in situations where frequent personnel flow in and out, pressure differentials fluctuate rapidly, and rapid adjustment is required. The ventilation duct 3 should be appropriately laid out based on actual needs and space constraints. Any return air ducts and other features can be appropriately configured according to existing technologies and will not be further detailed here.

[0019] It also includes a microprocessor electrically connected to the pressure differential sensor 2, the frequency converter and the regulating valve 5, wherein the microprocessor dynamically adjusts the frequency converter and / or the regulating valve 5 using the data collected in real time by the pressure differential sensor 2 to keep the air pressure difference between the explosion-proof zone and the vestibule zone I within a preset pressure differential range.

[0020] When in use, the pressure difference sensor collects the pressure difference data of the two spaces in real time and sends it to the microprocessor. The microprocessor determines whether the real-time collected pressure difference data meets the preset pressure difference requirements. The preset pressure difference range is 10-20Pa. If the preset pressure difference requirements are not met, the microprocessor issues an instruction to adjust the inverter of fan 4 or adjust the operating status of the valve, and blow fresh air into the door lobby area I through the ventilation duct to maintain the required pressure difference.

[0021] Specifically, since both the fan and the regulating valve are provided, a more flexible control method can be implemented to cope with various situations where the pressure differential changes are large or small, and fast or slow. For example, a standard air volume P is calculated based on a preset pressure differential range, corresponding to a standard fan speed N. Under normal circumstances, the fan stable speed is adjusted at M. When M is greater than N, the air volume is maintained at P by reducing the opening of the regulating valve. When people frequently enter and exit and the air volume needs to be adjusted quickly, the opening of the regulating valve is first adjusted to achieve a quick adjustment effect. If the adjustment is still not in place, the fan speed is adjusted by adjusting the frequency converter, and then the air volume is adjusted again to meet the pressure differential stability requirement. Alternatively, when the difference between the real-time data and the maximum value of the preset pressure differential range is large, such as greater than 2Pa, preliminary adjustment can be achieved by adjusting the fan. When the difference between the real-time data and the maximum value of the preset pressure differential range is small, such as less than 2Pa, precise adjustment can be achieved by adjusting the valve opening. Alternatively, the fan is initially adjusted to the minimum required ventilation volume. As in the above process, the fan and regulating valve are coordinated and adjusted according to the size of the difference. The specific adjustment method can be reasonably selected according to the actual pressure difference changes. Therefore, this solution can dynamically adjust the fan and / or adjust the valve using the real-time data collected by the pressure difference sensor to ensure that the air pressure difference between the explosion-proof zone and the vestibule zone I is always maintained within the preset pressure difference range.

[0022] A communication module is also installed on the outside of the vestibule II area close to the non-explosion-proof area. The communication module includes at least one of Wi-Fi, Bluetooth, LoRa, Zigbee, and NB-IoT modules, which is used to communicate with the remote monitoring system, allowing staff to view the pressure difference status in the control room or through mobile devices, and automatically send an alarm when an abnormality is encountered to achieve remote monitoring.

[0023] Compared with the existing technology, the explosion-proof door vestibule provided in this embodiment can automatically monitor the pressure difference through a pressure differential sensor, automatically and continuously monitor the pressure difference between the explosion-proof door vestibule and the explosion-proof area in real time, and then make intelligent judgments through the microprocessor based on the real-time data of the pressure differential sensor, dynamically adjust the fan and the regulating valve, and adjust the air volume entering the door vestibule to maintain a constant positive pressure differential; through a precise control algorithm, the fan and the regulating valve cooperate in an orderly manner to avoid frequent start-up and speed adjustment of the fan. Compared with frequent start-up or speed adjustment of the fan, in some cases, a stable pressure differential can be achieved by adjusting the regulating valve, which can effectively save energy; a remote monitoring system can be optionally equipped with a communication module to realize remote monitoring; the design takes into account easy maintenance, and key components such as filters and fans are easy to replace, reducing maintenance costs; the door vestibule is divided into door vestibule area I and door vestibule area II. While maintaining a stable pressure differential in door vestibule area I, door vestibule area II is used to form a reinforced isolation area to improve safety protection. Through the combination of the above structures and functions, the explosion-proof door vestibule of this solution can not only ensure the safety of the explosion-proof area, but also realize automated management while saving energy, greatly improving the reliability and efficiency of the system.

[0024] Example 2

[0025] Unlike Example 1, an alarm is installed on the outside of the entrance area II, near the non-explosion-proof area, and is connected to a microprocessor. When the microprocessor determines that the real-time collected pressure differential data does not meet the preset pressure differential requirement, the alarm will sound an audible and optical alarm at the entrance to the non-explosion-proof area, promptly alerting personnel. This forms a supplementary monitoring method for remote monitoring, avoiding the situation where only remote monitoring is used and there is a lack of on-site alarm means, operators are not effectively warned, and enter the non-explosion-proof area in dangerous situations, resulting in safety accidents. The installation of an alarm at the entrance to the non-explosion-proof area effectively improves on-site safety.

[0026] Example 3

[0027] What is different from Example 1 is that a display screen connected to a microprocessor is provided on the outside of the vestibule II area close to the non-explosion-proof area, which is used to display the pressure difference data collected by the pressure difference sensor, as well as the fan parameters and regulating valve data in real time; similarly, it is set outside the vestibule of the non-explosion-proof area, so that on-site operators can check it in time, which can effectively improve on-site safety.

[0028] The above description is merely an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. A person of ordinary skill in the art is aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, is able to obtain all existing technologies in the field, and has the ability to apply conventional experimental means before that date. A person of ordinary skill in the art can, under the guidance of this application, improve and implement this scheme in combination with his or her own abilities. Some typical known structures or methods should not become an obstacle for a person of ordinary skill in the art to implement this application. It should be pointed out that a person of ordinary skill in the art can make several variations and improvements without departing from the structure of the present invention. These should also be regarded as within the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An explosion-proof door compartment, characterized in that: The invention comprises a vestibule arranged between an explosion-proof zone and a non-explosion-proof zone, wherein the vestibule is used to divide vestibule zone I in the explosion-proof zone and vestibule zone II between the explosion-proof zone and the non-explosion-proof zone, and a door is staggered between the explosion-proof zone and vestibule zone I, between vestibule zone I and vestibule zone II, and between vestibule zone II and the non-explosion-proof zone; a pressure difference sensor for real-time acquisition of air pressure difference data between the explosion-proof zone and vestibule zone I is arranged in the vestibule zone I; at least one air supply port is also arranged in the vestibule zone I, and the air supply port is connected to a fan for providing fresh air through a ventilation duct, wherein the fan has a frequency converter and a regulating valve is arranged on the ventilation duct; and the invention also comprises a microprocessor electrically connected to the pressure difference sensor, the frequency converter and the regulating valve, wherein the microprocessor dynamically adjusts the frequency converter and / or the regulating valve using the pressure difference data acquired in real time by the pressure difference sensor to keep the air pressure difference between the explosion-proof zone and vestibule zone I within a preset pressure difference range.

2. The explosion-proof door lobby according to claim 1, characterized in that: The fan is an axial flow fan.

3. The explosion-proof door lobby according to claim 1, characterized in that: The air inlet of the fan is equipped with a filter assembly.

4. The explosion-proof door lobby according to claim 1, characterized in that: The regulating valve is an electric regulating valve.

5. The explosion-proof door lobby according to claim 1, characterized in that: A communication module is also installed on the outside of the lobby II area close to the non-explosion-proof area, and the communication module includes at least one of Wi-Fi, Bluetooth, LoRa, Zigbee, and NB-IoT modules.

6. The explosion-proof door lobby according to claim 1, characterized in that: An alarm is provided on the outer side of the lobby II area close to the non-explosion-proof area, and the alarm is connected to a microprocessor.

7. The explosion-proof door lobby according to claim 1, characterized in that: A display screen connected to a microprocessor is provided on the outer side of the lobby II area close to the non-explosion-proof area.

Images