Chemical safety ventilation device

Abstract

The utility model discloses a chemical safety ventilation device, relates to ventilation equipment technical field, including the ventilation pipe, the inner cavity of ventilation pipe is lapped with fan, primary effect filter screen and purification net, and primary effect filter screen and purification net are located the left side and right side of fan respectively, the left lower side of ventilation pipe is provided with run-through rectangular groove 1, the right side of ventilation pipe is provided with run-through rectangular groove 2, and the run-through rectangular groove 2 is provided with run-through rectangular groove 3. Three second rectangular grooves are formed in the lower surface of the left side of the ventilation pipe in a penetrating mode, and protrusions are fixedly installed in an inner cavity of the ventilation pipe. By means of the L-shaped ventilation pipe, air is discharged from the lower end of the ventilation pipe, the situation that rainwater enters the ventilation pipe through the air outlet to make contact with the draught fan, and consequently the draught fan is short-circuited or damaged can be avoided, and the side edge of the ventilation pipe can be shielded from rain through the baffle; rainwater is prevented from entering the ventilation pipe from the second rectangular groove, the primary filter screen, the draught fan and the purification net are more flexible to disassemble and assemble through the insertion blocks and the wedge-shaped blocks, and maintenance of the primary filter screen, the draught fan and the purification net is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically to a chemical safety ventilation device. Background Technology

[0002] Chemical plants typically generate flammable, explosive, and toxic gases during production. To ensure normal production operations and a safe working environment for operators' occupational health, ventilation systems are required to provide adequate ventilation within the plant.

[0003] Chinese patent document CN221526792U discloses a chemical safety ventilation device. By setting an adjustable fan installation structure, it is easy to control the removal and disassembly of the fan, which can improve maintenance efficiency and reduce the impact on the use of chemical safety ventilation. By setting an external filter structure, it is easy to automatically lock and fix. When used with sensing equipment, it can realize automatic control limit structure, reducing the trouble of manual operation and installation.

[0004] The existing technology has the following problems:

[0005] Although the aforementioned ventilation device allows for quick disassembly and maintenance of the fan, the movable opening is located at the top of the mounting base, making it easy for external rainwater to enter the mounting base and come into contact with the fan, potentially causing a short circuit or damage to the fan. Current ventilation devices typically use activated carbon mesh to adsorb chemical gases, but existing ventilation devices are not convenient for maintaining the activated carbon mesh. After a period of time, the adsorption performance of the activated carbon mesh will decrease, which will affect the gas treatment of the factory. Utility Model Content

[0006] This invention provides a chemical safety ventilation device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A chemical safety ventilation device includes a ventilation duct. A fan, a primary filter, and a purification screen are connected to the inner cavity of the ventilation duct, with the primary filter and purification screen located on the left and right sides of the fan, respectively. A through rectangular groove is formed on the lower left side of the ventilation duct, and three rectangular grooves are formed through the lower left surface of the ventilation duct. A protrusion is fixedly installed inside the ventilation duct, and a positioning component is fixedly installed on the right side of the lower top surface of the ventilation duct. The positioning component includes an activated carbon box, the lower surface of which overlaps with the upper surface of the protrusion.

[0009] The inner cavity of the rectangular groove two is fitted with insert blocks, and the insert blocks are fixedly installed to the ventilation pipe by screws. The upper surfaces of the tops of the three insert blocks are respectively fixedly installed to the lower surfaces of the primary filter, the fan, and the purification screen.

[0010] A box plate is fixedly installed on the left side of the activated carbon box through a rectangular groove. L-shaped pressure plates are respectively snapped into the front and rear positions on the left side of the box plate. A horizontal plate is fixedly installed on the upper side of the two pressure plates on opposite sides. An electric push rod is fixedly installed on the upper surface of the horizontal plate.

[0011] Preferably, the ventilation duct has an L-shaped structure and the insert has a T-shaped structure.

[0012] Preferably, baffles are fixedly installed at both the front and rear positions on the left side of the ventilation duct, and the baffles have a Z-shaped structure.

[0013] Preferably, the upper surface of the ventilation duct inner cavity is provided with three wedge-shaped grooves, the inner cavity of the wedge-shaped grooves is engaged with wedge-shaped blocks, and the lower surfaces of the three wedge-shaped blocks are respectively fixedly installed with the upper surfaces of the primary filter, the fan, and the purification screen.

[0014] Preferably, a dustproof net is fixedly installed on the lower right side of the inner cavity of the ventilation duct, and the dustproof net is located below the protrusion.

[0015] Preferably, an L-shaped rain cover is fixedly installed on the right side of the lower surface of the top of the ventilation duct, and the lower surface of the inner cavity of the rain cover is fixedly installed with the fixed end of the electric push rod.

[0016] Preferably, a mounting base is fixedly installed on the lower left side of the bottom of the ventilation duct, and a triangular block is fixedly installed on the right side of the opposite side of the mounting base. A triangular groove is opened on the lower right side of the box plate, and the inner side of the triangular groove is engaged with the outer side of the triangular block.

[0017] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0018] 1. This utility model provides a chemical safety ventilation device. The L-shaped ventilation pipe allows gas to exit from the lower end, preventing rainwater from entering the ventilation pipe through the outlet and contacting the fan, thus avoiding short circuits or damage. A baffle protects the sides of the ventilation pipe from rain, preventing rainwater from entering through the rectangular groove. Inserts and wedges allow for more flexible assembly and disassembly of the primary filter, fan, and purification screen, facilitating maintenance. A dustproof net prevents dust accumulation, allowing for direct external cleaning of impurities and reducing the impact on chemical safety ventilation operations.

[0019] 2. This utility model provides a chemical safety ventilation device. The horizontal plate is driven to move up by an electric push rod, and the horizontal plate drives the pressure plate to move up, so that it no longer presses against the box plate. Then the box plate is moved to the left, so that the triangular groove and the triangular block are separated, and the activated carbon box is pulled out of the ventilation pipe, which facilitates the replacement of the activated carbon box and avoids affecting the ventilation of the chemical plant. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a bottom view of the structure of this utility model;

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 4 This is an enlarged structural diagram of point A in this utility model;

[0024] Figure 5 This is a cross-sectional view of the ventilation duct of this utility model;

[0025] Figure 6 This is a schematic diagram of the fan structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the positioning component structure of this utility model;

[0027] Figure 8 This is an exploded view of the positioning component of this utility model;

[0028] Figure 9 This is a schematic diagram of the box panel structure of this utility model.

[0029] In the diagram: 1. Ventilation duct; 2. Baffle; 3. Positioning component; 31. Rain cover; 32. Mounting base; 33. Box plate; 34. Horizontal plate; 35. Pressure plate; 36. Electric actuator; 37. Activated carbon box; 38. Triangular groove; 39. Triangular block; 4. Primary filter; 5. Rectangular groove one; 6. Dustproof net; 7. Protrusion; 8. Purification net; 9. Fan; 10. Wedge groove; 11. Rectangular groove two; 12. Insert block; 13. Wedge block. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0031] like Figures 1-9As shown, a chemical safety ventilation device includes a ventilation pipe 1. A fan 9, a primary filter 4, and a purification screen 8 are connected to the inner cavity of the ventilation pipe 1. The primary filter 4 and the purification screen 8 are located on the left and right sides of the fan 9, respectively. A through rectangular groove 5 is opened on the lower left side of the ventilation pipe 1. Three rectangular grooves 11 are opened through the lower left side of the ventilation pipe 1. A protrusion 7 is fixedly installed in the inner cavity of the ventilation pipe 1. The ventilation pipe 1 has an L-shaped structure. A positioning component 3 is fixedly installed on the right side of the lower top surface of the ventilation pipe 1. The positioning component 3 includes an activated carbon box 37. The lower surface of the activated carbon box 37 overlaps with the upper surface of the protrusion 7. A box plate 33 is fixedly installed on the left side of the activated carbon box 37 through the rectangular groove 5. L-shaped pressure plates 35 are respectively snapped into the front and rear positions on the left side of the box plate 33. A horizontal plate 34 is fixedly installed on the upper side of the two pressure plates 35 on opposite sides. An electric push rod 36 is fixedly installed on the upper surface of the horizontal plate 34.

[0032] In use, the L-shaped ventilation duct 1 is installed at the ventilation point of the chemical plant, allowing gas to exit from the lower end of the duct. This prevents rainwater from entering the duct 1 through the outlet and coming into contact with the fan 9, which could cause a short circuit or damage to the fan 9. The negative pressure generated by the fan 9 forces the gas out of the plant through the ventilation duct 1. The gas first passes through the primary filter 4 to remove particulate impurities, then passes through the fan 9 and enters the purification screen 8. The purification screen 8 further purifies the filtered gas, removing harmful substances. The purified gas then flows along the ventilation duct 1 into the activated carbon box 37 for adsorption, and finally exits through the dustproof net 6. Ventilation duct 1 is used to ensure safe ventilation in the chemical plant. When the adsorption performance of activated carbon box 37 decreases, the electric push rod 36 drives the horizontal plate 34 to move upward, and the horizontal plate 34 drives the pressure plate 35 to move upward, so that it no longer presses the box plate 33. Then, the box plate 33 is moved to the left to separate the box plate 33 from the mounting base 32, and the activated carbon box 37 is pulled out of the ventilation duct 1. Then, a new activated carbon box 37 is inserted into the ventilation duct 1 through the rectangular groove 5, so that the lower surface of the activated carbon box 37 overlaps with the upper surface of the protrusion 7. The electric push rod 36 drives the horizontal plate 34 and the pressure plate 35 to move downward to press and fix the box plate 33, which facilitates the replacement of activated carbon box 37 and avoids affecting the ventilation of the chemical plant.

[0033] like Figures 3-6 As shown, the inner cavity of the rectangular groove 11 is fitted with a plug 12, and the plug 12 is fixedly installed to the ventilation pipe 1 by screws. The upper surface of the top of the three plugs 12 is fixedly installed to the lower surface of the primary filter 4, the fan 9, and the purification screen 8, respectively. The plug 12 has a T-shaped structure. The upper surface of the inner cavity of the ventilation pipe 1 is provided with three wedge-shaped grooves 10. The inner cavity of the wedge-shaped grooves 10 is fitted with wedge-shaped blocks 13. The lower surface of the three wedge-shaped blocks 13 is fixedly installed to the upper surface of the primary filter 4, the fan 9, and the purification screen 8, respectively.

[0034] The insertion block 12 and wedge block 13 make the disassembly and assembly of the primary filter 4, fan 9 and purification screen 8 more flexible and convenient for maintenance. The wedge block 13 and wedge groove 10 can be used to position and install the primary filter 4, fan 9 and purification screen 8.

[0035] like Figures 1-3 As shown, baffles 2 are fixedly installed at both the front and rear positions on the left side of the ventilation duct 1. The baffles 2 have a Z-shaped structure.

[0036] The baffle 2 can protect the side of the ventilation pipe 1 from rain, preventing rainwater from entering the ventilation pipe 1 through the rectangular groove 11.

[0037] like Figures 2-5 , Figure 7 As shown, a dustproof net 6 is fixedly installed on the lower right side of the inner cavity of the ventilation pipe 1, and the dustproof net 6 is located below the protrusion 7.

[0038] The dustproof net 6 serves to prevent dust accumulation, and the impurities and particles accumulated on the dustproof net 6 can be directly cleaned from the outside, reducing the impact on chemical safety ventilation.

[0039] like Figure 2 , Figure 3 , Figures 7-9 As shown, an L-shaped rain cover 31 is fixedly installed on the right side of the lower surface of the top of the ventilation pipe 1, and the lower surface of the inner cavity of the rain cover 31 is fixedly installed with the fixed end of the electric push rod 36.

[0040] The rain cover 31 can protect the electric actuator 36 from rain, preventing rainwater from entering the electric actuator 36 and affecting its normal operation.

[0041] like Figures 3-6 As shown, a mounting base 32 is fixedly installed on the lower left side of the bottom of the ventilation duct 1, and a triangular block 39 is fixedly installed on the right side of the opposite side of the mounting base 32. A triangular groove 38 is opened on the lower right side of the box plate 33, and the inner side of the triangular groove 38 is engaged with the outer side of the triangular block 39.

[0042] When installing the activated carbon box 37, the interlocking action between the triangular groove 38 and the triangular block 39 can play a positioning role and assist in the installation of the activated carbon box 37.

[0043] The working principle of this utility model is as follows: In use, the L-shaped ventilation pipe 1 is installed at the ventilation point of the chemical plant, allowing gas to exit from the lower end of the ventilation pipe 1. This prevents rainwater from entering the ventilation pipe 1 through the air outlet and coming into contact with the fan 9, which could cause a short circuit or damage to the fan 9. The negative pressure generated by the fan 9 forces the gas out of the plant through the ventilation pipe 1. The gas first passes through the primary filter 4 to remove particulate impurities. Then, it passes through the fan 9 and enters the purification screen 8, where the filtered gas is purified to remove harmful substances. The purified gas flows along the ventilation pipe 1 into the activated carbon box 37 for adsorption. Finally, it exits the ventilation pipe 1 through the dustproof net 6, ensuring safe ventilation in the chemical plant. When the adsorption performance of the activated carbon box 37 decreases, the electric actuator 36 moves the horizontal plate 34 upward, which in turn moves the pressure plate 35 upward, thus removing it from the pressure plate 33. Then move the box plate 33 to the left to separate the triangular groove 38 from the triangular block 39, pull the activated carbon box 37 out of the ventilation pipe 1, and then insert the new activated carbon box 37 through the rectangular groove 1 5 into the ventilation pipe 1, so that the lower surface of the activated carbon box 37 overlaps with the upper surface of the protrusion 7, and the triangular groove 38 on the box plate 33 engages with the triangular block 39. The electric push rod 36 drives the horizontal plate 34 and the pressure plate 35 to move down and press the box plate 33 to fix it, which facilitates the replacement of the activated carbon box 37 and avoids affecting the ventilation of the chemical plant. The baffle 2 can protect the side of the ventilation pipe 1 from rain and prevent rainwater from entering the ventilation pipe 1 from the rectangular groove 2 11. The insertion block 12 and the wedge block 13 make the disassembly and assembly of the primary filter screen 4, the fan 9, and the purification screen 8 more flexible and convenient for maintenance. The dustproof net 6 plays a role in dust prevention. The impurities and particles accumulated on the dustproof net 6 can be directly cleaned from the outside, reducing the impact on the chemical safety ventilation work.

[0044] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A chemical safety ventilation device, comprising a ventilation duct (1), characterized in that: The ventilation pipe (1) has a fan (9), a primary filter (4), and a purification screen (8) connected to its inner cavity. The primary filter (4) and the purification screen (8) are located on the left and right sides of the fan (9), respectively. A through rectangular groove (5) is opened on the lower left side of the ventilation pipe (1). Three rectangular grooves (11) are opened through the lower left side of the ventilation pipe (1). A protrusion (7) is fixedly installed in the inner cavity of the ventilation pipe (1). A positioning component (3) is fixedly installed on the right side of the lower top surface of the ventilation pipe (1). The positioning component (3) includes an activated carbon box (37). The lower surface of the activated carbon box (37) overlaps with the upper surface of the protrusion (7). The inner cavity of the rectangular groove 2 (11) is fitted with a plug (12), and the plug (12) is fixedly installed to the ventilation pipe (1) by screws. The upper surface of the top of the three plugs (12) is fixedly installed to the lower surface of the primary filter (4), the fan (9), and the purification screen (8), respectively. A box plate (33) is fixedly installed on the left side of the activated carbon box (37) through a rectangular groove (5). L-shaped pressure plates (35) are respectively snapped into the front and rear positions on the left side of the box plate (33). A horizontal plate (34) is fixedly installed on the upper side of the two pressure plates (35) on opposite sides. An electric push rod (36) is fixedly installed on the upper surface of the horizontal plate (34).

2. The chemical safety ventilation device according to claim 1, characterized in that: The ventilation pipe (1) has an L-shaped structure, and the insert (12) has a T-shaped structure.

3. A chemical safety ventilation device according to claim 1, characterized in that: Baffles (2) are fixedly installed at the front and rear positions on the left side of the ventilation pipe (1), and the baffles (2) have a Z-shaped structure.

4. A chemical safety ventilation device according to claim 1, characterized in that: The upper surface of the inner cavity of the ventilation pipe (1) is provided with three wedge-shaped grooves (10), and the inner cavity of the wedge-shaped grooves (10) is fitted with wedge-shaped blocks (13). The lower surfaces of the three wedge-shaped blocks (13) are respectively fixedly installed on the upper surfaces of the primary filter (4), the fan (9), and the purification screen (8).

5. A chemical safety ventilation device according to claim 1, characterized in that: A dustproof net (6) is fixedly installed on the lower right side of the inner cavity of the ventilation pipe (1), and the dustproof net (6) is located below the protrusion (7).

6. A chemical safety ventilation device according to claim 1, characterized in that: An L-shaped rain cover (31) is fixedly installed on the right side of the lower surface of the top of the ventilation pipe (1), and the lower surface of the inner cavity of the rain cover (31) is fixedly installed with the fixed end of the electric push rod (36).

7. A chemical safety ventilation device according to claim 1, characterized in that: A mounting base (32) is fixedly installed on the lower left side of the bottom of the ventilation pipe (1). A triangular block (39) is fixedly installed on the right side of the opposite side of the mounting base (32). A triangular groove (38) is opened on the lower right side of the box plate (33). The inner side of the triangular groove (38) is engaged with the outer side of the triangular block (39).

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