Monitoring alarm equipment suitable for chemical process management

Abstract

The utility model discloses a monitoring alarm device suitable for chemical process management, which comprises a pressure sensor fixedly communicated with a reaction kettle connecting pipe, a communicating pipe is arranged on the pressure sensor, and the pressure sensor can monitor pressure cleaning in a reaction kettle through the communicating pipe and the reaction kettle connecting pipe. And a protection box of which the bottom and the front side are opened is arranged above the communicating pipe of the pressure sensor. Through the arrangement of a series of structures, the gas detection alarm mechanism can be shielded and protected in the monitoring alarm process, the influence of external dust is reduced, the filter screen can be reversely blown and cleaned at regular time, the situation that the filter screen is blocked by dust can be effectively reduced, the ventilation stability is improved, and the service life of the filter screen is prolonged. In addition, the protection box can be installed in a clamping and fixing mode, and subsequent overall rapid disassembly and assembly are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of chemical process management technology, and in particular to a monitoring and alarm device suitable for chemical process management. Background Technology

[0002] Chemical processes, also known as chemical technology or chemical production technology, refer to the methods and processes by which raw materials are transformed into products through chemical reactions, including all measures to achieve this transformation. In chemical production, reaction vessels are commonly used equipment. During chemical production, it is necessary for staff to monitor and manage the reaction vessel equipment. Current technology for monitoring and alarm equipment used in chemical process management often uses pressure sensors to monitor the internal gas pressure of the reaction vessel equipment and gas detectors to monitor the surrounding environment to check for leaks or harmful gases. When abnormal pressure, leaks, or harmful gases are detected, an alarm will be triggered to remind personnel.

[0003] In the prior art, the gas detectors of monitoring and alarm devices used for chemical process management are usually directly exposed and installed around the reactor equipment. This exposed installation method lacks protection and dust cleaning structures. When the detection probe or detection hole of the gas detector is blocked by dust particles, it will affect the normal detection operation. In view of the above, this application proposes a monitoring and alarm device suitable for chemical process management. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a monitoring and alarm device suitable for chemical process management.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A monitoring and alarm device suitable for chemical process management includes a pressure sensor fixedly connected to a reactor connecting pipe. The pressure sensor has a connecting pipe, allowing it to monitor the pressure inside the reactor via the connecting pipe. A protective box with openings at the bottom and front is located above the connecting pipe. A cover is rotatably mounted on the front of the protective box, covering the openings. A gas detection alarm mechanism for detecting external gases is fixedly connected to the inner top wall of the protective box and is electrically connected to the pressure sensor. The bottom sides of the protective box are also fixedly... The protective box is fixedly connected to a clamping and fixing mechanism. Two clamping and fixing mechanisms are respectively sleeved on the connecting pipe of the reactor and the connecting pipe of the pressure sensor. The protective box can be installed on the connecting pipe of the reactor and the connecting pipe of the pressure sensor through the two clamping and fixing mechanisms. A filter screen is fixedly installed inside the protective box below the gas detection alarm mechanism. The filter screen is used to filter and prevent dust from entering the protective box. Above the filter screen is a backflushing cleaning mechanism installed inside the protective box for backflushing the filter screen. A threaded drive mechanism for driving the backflushing cleaning mechanism is embedded and fixed on the inner wall of the right side of the protective box. The threaded drive mechanism is connected to the backflushing cleaning mechanism.

[0007] Preferably, the gas detection alarm mechanism includes a PLC controller, a gas detector, and an alarm fixedly connected to the inner wall of the top of the protective box, and the PLC controller is electrically connected to the gas detector, the alarm, and the pressure sensor.

[0008] Preferably, the clamping and fixing mechanism includes a U-shaped mounting base fixedly connected to the bottom of the protective box. Two U-shaped mounting bases are respectively sleeved on the reactor connecting pipe and the connecting pipe of the pressure sensor. A first friction rubber is bonded and fixed to the bottom inner wall of the U-shaped mounting base. The top of the connecting pipe and the top of the reactor connecting pipe are movably in contact with clamps. The clamps and the first friction rubber cooperate to fix the U-shaped mounting base on the connecting pipe and the reactor connecting pipe. A T-shaped screw is rotatably installed on the top of the clamp. The U-shaped mounting base is movably sleeved on the corresponding T-shaped screw. The protective box is threaded onto the two T-shaped screws. The threaded connection allows the T-shaped screws to rotate and move vertically at the same time.

[0009] Preferably, the backflushing cleaning mechanism includes a diversion box disposed above the filter screen. Multiple backflushing pipe heads are fixedly connected to the bottom of the diversion box. An air pump is embedded and fixedly installed on the top of the protective box. The air pump is used to provide gas. The top of the air pump is the extraction end and is fixedly connected to a first dustproof net. The bottom of the air pump is the exhaust end and is connected and fixedly connected to a vent pipe with a cover-shaped structure at the top. The left side of the vent pipe is fixedly connected to the left inner wall of the protective box. A telescopic hose is fixedly connected between the right end of the vent pipe and the left side of the diversion box. The telescopic hose provides a lateral movement distance for the diversion box by utilizing its telescopic characteristics.

[0010] Preferably, the threaded drive mechanism includes a drive motor embedded and fixed on the inner wall of the right side of the protective box, a reciprocating screw rotatably mounted on the right side of the vent pipe, a left end of the output shaft of the drive motor fixedly connected to the right end of the reciprocating screw, a guide rod fixedly connected between the left side of the drive motor and the right side of the vent pipe, a moving block threadedly fitted on the reciprocating screw, the moving block slidingly fitted on the guide rod, the guide rod providing lateral guidance for the moving block, the threaded connection between the reciprocating screw and the moving block allows the moving block to cyclically move right and left while the reciprocating screw rotates, the bottom of the moving block is fixedly connected to the top of the diverter box, and a timer control switch is embedded and fixedly mounted on the top of the protective box, the timer control switch being electrically connected to the drive motor and the air pump, the timer control switch being able to set the opening and closing times of the drive motor and the air pump.

[0011] Preferably, a sound passage hole is provided on the top inner wall of the protective box, the alarm is fixedly connected in the sound passage hole, and a second dustproof net is fixedly installed in the sound passage hole above the alarm. The second dustproof net is set to prevent dust and reduce the possibility of dust entering the interior of the protective box through the sound passage hole.

[0012] Preferably, the top of the lid is fixed to the front of the protective box by two hinges with screws. The lid is rotatably installed with the protective box by the two hinges. A magnet is embedded and fixed at the bottom of the front side of the protective box. The lid is made of iron and is attracted to the magnet. A pull tab is fixedly connected to the front side of the lid.

[0013] Compared with existing technologies, the beneficial effects of this utility model are:

[0014] 1. By setting up a clamping and fixing mechanism, the protective box and its internal gas detection alarm mechanism can be installed on the connecting pipe of the reactor and the connecting pipe of the pressure sensor through clamping and fixing. The clamping and fixing method facilitates quick assembly and disassembly of the whole system.

[0015] 2. By combining the gas detection alarm mechanism with the pressure sensor, the pressure inside the reactor and the external gas can be detected, and an alarm can be set up in time to remind personnel when an abnormality is detected;

[0016] 3. By combining the protective box and the filter, the gas detection alarm mechanism can be shielded and protected, reducing the impact of external dust during the detection process and effectively reducing the risk of damage from collisions with external objects. In addition, with the back-flushing cleaning mechanism, the threaded drive mechanism and the timer control switch, the filter can be back-flushed and cleaned at regular intervals, which can effectively reduce the dust clogging of the filter and improve the ventilation stability, thus not affecting the normal detection and use of the gas detector.

[0017] This utility model, through a series of structural designs, can shield and protect the gas detection alarm mechanism during monitoring and alarm processes, reducing the impact of external dust. It can also periodically backflush and clean the filter screen, effectively reducing dust clogging and improving ventilation stability, thus not affecting the normal detection and use of the gas detector. In addition, the protective box can be installed by clamping and fixing, facilitating quick assembly and disassembly of the entire system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a monitoring and alarm device suitable for chemical process management proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of a monitoring and alarm device suitable for chemical process management proposed in this utility model;

[0020] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0021] In the diagram: 100, Reactor connecting pipe; 1, Pressure sensor; 2, Gas detector; 3, Protective box; 301, Box cover; 4, Clamping and fixing mechanism; 401, U-shaped mounting base; 402, Clamping plate; 403, T-shaped screw; 5, PLC controller; 6, Timer control switch; 7, Alarm; 8, Backflush cleaning mechanism; 801, Air pump; 802, Vent pipe; 803, Diverter box; 804, Telescopic hose; 805, Backflush pipe head; 9, Filter screen; 10, Threaded drive mechanism; 1001, Drive motor; 1002, Reciprocating screw; 1003, Moving block; 1004, Guide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1 As shown:

[0024] A monitoring and alarm device suitable for chemical process management includes a pressure sensor 1 fixedly connected to a reactor connecting pipe 100. The pressure sensor 1 is provided with a connecting pipe, and the pressure sensor 1 can monitor the pressure inside the reactor through the connecting pipe and the reactor connecting pipe 100.

[0025] In this implementation plan: To address the technical problems existing in the prior art, such as the "monitoring and alarm equipment for chemical process management in the prior art disclosed in the background art above, whose gas detectors are usually directly exposed and installed around the reactor equipment, the exposed installation method lacks protection and dust cleaning structure. When the detection probe or detection hole of the gas detector is blocked by dust particles, it will affect the normal detection work; in addition, its installation usually adopts conventional bolt fixing installation, which is inefficient and inconvenient for subsequent disassembly and maintenance." In combination with the use, this problem is obviously a real and difficult problem to solve. All electrical equipment involved in this product is powered by an external power source.

[0026] Furthermore:

[0027] Reference Figure 1-3 Above the connecting pipe of pressure sensor 1 is a protective box 3 with openings at the bottom and front. A cover 301 is rotatably mounted on the front of the protective box 3. Two hinges are fixed between the top of the cover 301 and the front of the protective box 3 by screws. The cover 301 is rotatably mounted to the protective box 3 via the two hinges. A magnet is embedded and fixed at the bottom of the front of the protective box 3. The cover 301 is made of iron and is attracted to the magnet. A pull tab is fixedly connected to the front of the cover 301. The cover 301 is used to cover the opening on the front of the protective box 3. The cover 301 can be opened by pulling the pull tab to release the obstruction on the front of the protective box 3, allowing personnel to access the internal electronic components through the opening on the front of the protective box 3. During operation, a gas detection alarm mechanism for detecting external gas is fixedly connected to the top inner wall of the protective box 3. The gas detection alarm mechanism is electrically connected to the pressure sensor 1. The gas detection alarm mechanism includes a PLC controller 5, a gas detector 2, and an alarm 7 fixedly connected to the top inner wall of the protective box 3. The PLC controller 5 is electrically connected to the gas detector 2, the alarm 7, and the pressure sensor 1. A sound passage hole is opened on the top inner wall of the protective box 3. The alarm 7 is fixedly connected in the sound passage hole. A second dustproof net is fixedly installed in the sound passage hole above the alarm 7. The second dustproof net is set to prevent dust and reduce the situation where dust enters the interior of the protective box 3 through the sound passage hole.

[0028] Two clamping and fixing mechanisms 4 are fixedly connected to both sides of the bottom of the protective box 3. The two clamping and fixing mechanisms 4 are respectively sleeved on the reactor connecting pipe 100 and the connecting pipe of the pressure sensor 1. The clamping and fixing mechanism 4 includes a U-shaped mounting base 401 fixedly connected to the bottom of the protective box 3. The two U-shaped mounting bases 401 are respectively sleeved on the reactor connecting pipe 100 and the connecting pipe of the pressure sensor 1. A first friction rubber is glued and fixed to the bottom inner wall of the U-shaped mounting base 401. The top of the connecting pipe and the top of the reactor connecting pipe 100 are movably in contact with a clamping plate 402. A second friction rubber is glued and fixed to the bottom of the clamping plate 402. The clamping plate 402, the second friction rubber and the first friction rubber cooperate to fix the U-shaped mounting base 401 on the connecting pipe and the reactor connecting pipe 100. The top of the clamping plate 402 can rotate. A T-shaped screw 403 is installed, and a first bearing is fixedly connected to the top of the clamping plate 402. The inner side of the inner ring of the first bearing is fixedly connected to the outer side of the corresponding T-shaped screw 403. The first bearing serves to allow the corresponding T-shaped screw 403 to rotate and be installed. A U-shaped mounting base 401 is movably sleeved on the corresponding T-shaped screw 403. A movable hole is opened on the top inner wall of the U-shaped mounting base 401. The T-shaped screw 403 is located in the corresponding movable hole and makes movable contact with the inner wall of the movable hole. The movable hole is used for the corresponding T-shaped screw 403 to pass through. A protective box 3 is threadedly sleeved on the two T-shaped screws 403. Threaded holes are opened on both sides of the top of the protective box 3. The threaded holes are threadedly connected to the corresponding T-shaped screw 403. The threaded connection allows the T-shaped screw 403 to rotate and move vertically at the same time.

[0029] A filter screen 9 is fixedly installed inside the protective box 3. The filter screen 9 is used to filter and prevent dust from entering the protective box 3. Above the filter screen 9, there is a backflushing cleaning mechanism 8 installed inside the protective box 3 for backflushing the filter screen 9. The backflushing cleaning mechanism 8 includes a diversion box 803 located above the filter screen 9. The bottom of the diversion box 803 is connected and fixed with multiple backflushing pipe heads 805. An air pump 801 is embedded and fixed in the top of the protective box 3. The top of the protective box 3 has an embedding groove for fixing and installing the air pump 801. The air pump 801 is used to supply gas. The top of the air pump 801 is the extraction end and is fixedly connected to a first dustproof net. The first dustproof net is set to filter and block dust in the gas drawn by the air pump 801. The bottom of the air pump 801 is the exhaust end and is connected to a vent pipe 802 with a cover-shaped structure at the top. The left side of the vent pipe 802 is fixedly connected to the left inner wall of the protective box 3. The right end of the vent pipe 802 is connected to the left side of the diversion box 803 and is fixedly connected to a telescopic hose 804. The telescopic hose 804 can provide a lateral movement distance for the diversion box 803 by utilizing its telescopic characteristics.

[0030] A threaded drive mechanism 10 is embedded and fixed on the inner right side of the protective box 3. The threaded drive mechanism 10 includes a drive motor 1001 embedded and fixed on the inner right side of the protective box 3. A reciprocating screw 1002 is rotatably mounted on the right side of the vent pipe 802. A second bearing is fixedly connected to the right side of the vent pipe 802. The inner ring of the second bearing is fixedly connected to the outer side of the reciprocating screw 1002. The second bearing serves to allow the reciprocating screw 1002 to rotate. The left end of the output shaft of the drive motor 1001 is connected to... The right end of the reciprocating screw 1002 is fixedly connected to a guide rod 1004, which is fixedly connected between the left side of the drive motor 1001 and the right side of the vent pipe 802. A moving block 1003 is threaded onto the reciprocating screw 1002. The right side of the moving block 1003 has a reciprocating thread hole for threaded connection with the reciprocating screw 1002. The moving block 1003 is slidably sleeved on the guide rod 1004. The right side of the moving block 1003 has a guide hole for slidingly fitting onto the outer side of the guide rod 1004. 1004 provides lateral guidance for the moving block 1003. The reciprocating screw 1002 is threadedly connected to the moving block 1003, allowing the moving block 1003 to move cyclically left and right while the reciprocating screw 1002 rotates. The bottom of the moving block 1003 is fixedly connected to the top of the diversion box 803. A timer control switch 6 is embedded and fixed on the top of the protective box 3. The timer control switch 6 is electrically connected to the drive motor 1001 and the air pump 801. The timer control switch 6 can set the opening and closing times of the drive motor 1001 and the air pump 801. Through a series of structural designs, this utility model can shield and protect the gas detection alarm mechanism during monitoring and alarm processes, reducing the impact of external dust. It can also periodically backflush and clean the filter screen 9, effectively reducing dust clogging of the filter screen 9 and improving ventilation stability, thus not affecting the normal detection and use of the gas detector 2. In addition, the protective box 3 can be installed by clamping and fixing, facilitating quick assembly and disassembly of the entire system.

[0031] Working principle: When the protective box 3 and the gas detection alarm mechanism are not connected to the connecting pipe of the reactor 100 and the pressure sensor 1, during connection, the two U-shaped mounting seats 401 are respectively fitted onto the connecting pipe of the reactor 100 and the connecting pipe of the pressure sensor 1, and the tops of the two first friction rubbers are in active contact with the bottoms of the reactor 100 and the pressure sensor 1 respectively. Then, the T-shaped screw 403 is rotated forward. As the T-shaped screw 403 rotates, it also drives the corresponding clamping plate 402 to move downward. The two clamping plates 402 move downward to the designated positions. Avoid close contact between the top of the reactor connecting pipe 100 and the top of the connecting pipe of the pressure sensor 1. Stop rotating the T-shaped screw 403. Under the clamping force between the clamping plate 402 and the U-shaped mounting base 401, the protective box 3 can be connected to the reactor connecting pipe 100 and the connecting pipe of the pressure sensor 1. In addition, by clamping and fixing, during subsequent disassembly, the T-shaped screw 403 can be rotated in the opposite direction to drive the clamping plate 402 to move upward to release the clamping state, and the protective box 3 can be removed directly. This clamping and fixing installation method can achieve quick assembly and disassembly of the whole.

[0032] When in use after installation, the alarm threshold of the alarm device 7 is preset through the PLC controller 5. The pressure sensor 1 detects the pressure inside the reactor through the connecting pipe and the reactor connecting pipe 100, and transmits the detected pressure value to the PLC controller 5. At the same time, the gas detector 2 extracts and detects the external gas through the filter screen 9, and transmits the detected data value to the PLC controller 5. When the data received by the PLC controller 5 exceeds the threshold, the PLC controller 5 controls the alarm device 7 to issue an audible and visual alarm to remind personnel, so that personnel can be informed in time and take action. In addition, during use, the protective box 3 and the filter screen 9 work together to shield the external dust and gas, preventing dust and gas from entering the gas detector 2 and affecting it. In addition, the protective box 3 can also shield and protect the PLC controller 5, the alarm device 7 and the gas detector 2, reducing the risk of damage from collisions with external objects.

[0033] The on / off times of the air pump 801 and drive motor 1001 are preset via a timer control switch 6. When the on / off time is reached, the air pump 801 and drive motor 1001 are turned on. The air pump 801 draws in external air, which is then discharged sequentially through the vent pipe 802, the telescopic hose 804, the diverter box 803, and multiple backflush nozzles 805 to backflush and clean the filter screen 9. During the backflush cleaning, dust and impurities adhering to the bottom of the filter screen 9 are blown off. Simultaneously, the output shaft of the drive motor 1001 drives the reciprocating screw 1002 to rotate. Under the action of the reciprocating screw hole on the moving block 1003, the rotation of the reciprocating screw 1002 drives the moving block 1003. 003 moves back and forth to the right and left. The moving block 1003 moves back and forth to the right and left on the guide rod 1004. The moving block 1003 drives the diversion box 803 to move back and forth to the right and left. When the diversion box 803 moves to the right, it stretches the telescopic hose 804. When the diversion box 803 moves to the left, it releases the tension on the telescopic hose 804. When the diversion box 803 moves back and forth to the right and left, it drives multiple back-blowing pipe heads 805 to move back and forth to the right and left in a cycle. When the back-blowing pipe heads 805 move back and forth to the right and left in a cycle, they can perform a comprehensive back-blowing cleaning of the filter screen 9. By back-blowing and cleaning the filter screen 9 at regular intervals, the situation of dust clogging the filter screen 9 can be effectively reduced, the ventilation stability can be improved, and thus the normal detection and use of the gas detector 2 can be unaffected.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A monitoring alarm device suitable for chemical process management, comprising a pressure sensor (1) fixed in communication with a reactor connecting pipe (100), wherein the pressure sensor (1) is provided with a communication pipe, characterized in that, The communication pipe of the pressure sensor (1) is provided with a protection box (3) with open top and front side, the front side of the protection box (3) is rotatably provided with a box cover (301), the top inner wall of the protection box (3) is fixedly connected with a gas detection alarm mechanism for detecting external gas, the gas detection alarm mechanism is electrically connected with the pressure sensor (1), the bottom sides of the protection box (3) are fixedly connected with clamping fixing mechanisms (4), the two clamping fixing mechanisms (4) are respectively sleeved on the communication pipe of the pressure sensor (1) and the reaction kettle connecting pipe (100), the protection box (3) is fixedly provided with a filter screen (9) below the gas detection alarm mechanism, the top of the filter screen (9) is provided with a back flushing cleaning mechanism (8) in the protection box (3) for back flushing the filter screen (9), the right inner wall of the protection box (3) is embeddedly fixed with a threaded driving mechanism (10) for driving the back flushing cleaning mechanism (8), and the threaded driving mechanism (10) is connected with the back flushing cleaning mechanism (8).

2. A monitoring and alarm device for use in chemical process management according to claim 1, characterized in that, The gas detection alarm mechanism comprises a PLC controller (5), a gas detector (2) and an alarm (7) fixedly connected to the top inner wall of the protection box (3), and the PLC controller (5) is electrically connected with the gas detector (2), the alarm (7) and the pressure sensor (1).

3. The monitoring and alarming device for chemical process management according to claim 1, wherein, The clamping fixing mechanism (4) comprises a U-shaped mounting seat (401) fixedly connected to the bottom of the protection box (3), the two U-shaped mounting seats (401) are respectively sleeved on the communication pipe of the pressure sensor (1) and the reaction kettle connecting pipe (100), the bottom inner wall of the U-shaped mounting seat (401) is adhesively fixed with a first friction rubber, the top of the communication pipe and the top of the reaction kettle connecting pipe (100) are movably contacted with clamping plates (402), the top of the clamping plate (402) is rotatably provided with a T-shaped screw rod (403), the U-shaped mounting seat (401) is movably sleeved on the corresponding T-shaped screw rod (403), and the protection box (3) is threadedly sleeved on the two T-shaped screw rods (403).

4. The monitoring and alarming device for chemical process management according to claim 1, wherein The back flushing cleaning mechanism (8) comprises a shunt box (803) arranged above the filter screen (9), a plurality of back flushing pipe heads (805) are fixedly communicated at the bottom of the shunt box (803), a gas pump (801) is embeddedly fixed at the top of the protection box (3), the top of the gas pump (801) is an extraction end and is fixedly connected with a first dust screen, the bottom of the gas pump (801) is an exhaust end and is fixedly communicated with a vent pipe (802) with a cover-shaped structure at the top end, the left side of the vent pipe (802) is fixedly connected with the left inner wall of the protection box (3), and the right end of the vent pipe (802) and the left side of the shunt box (803) are fixedly communicated with an elastic hose (804).

5. A monitoring and alarming device for use in chemical process management according to claim 4, characterized in that, The threaded drive mechanism (10) includes a drive motor (1001) embedded and fixed on the right side inner wall of the protection box (3), a reciprocating lead screw (1002) is rotatably installed on the right side of the air pipe (802), the left end of the output shaft of the drive motor (1001) is fixedly connected with the right end of the reciprocating lead screw (1002), a guide rod (1004) is fixedly connected between the left side of the drive motor (1001) and the right side of the air pipe (802), a moving block (1003) is threadedly sleeved on the reciprocating lead screw (1002), the moving block (1003) is slidably sleeved on the guide rod (1004), the bottom of the moving block (1003) is fixedly connected with the top of the shunt box (803), a timing control switch (6) is embedded and fixed on the top of the protection box (3), and the timing control switch (6) is electrically connected with the drive motor (1001) and the air pump (801).

6. The monitoring and alarming device for chemical process management according to claim 2, wherein The top inner wall of the protection box (3) is provided with a sound hole, and the alarm (7) is fixedly connected in the sound hole.

7. The monitoring and alarming device for chemical process management according to claim 1, wherein The top of the box cover (301) and the front side of the protection box (3) are fixedly connected by two hinges through screws, the box cover (301) is rotatably installed on the protection box (3) through the two hinges, a magnet is embedded and fixed on the front bottom of the protection box (3), the box cover (301) is made of iron and is attracted to the magnet, and a puller is fixedly connected to the front side of the box cover (301).

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