Chemical safety ventilation device

Abstract

The utility model belongs to chemical technology field especially, a kind of chemical safety ventilation device, to the filter core of the filter device of the existing traditional equipment timing replacement needs to stop and the problem that single-stage filter screen cannot intercept superfine particles and toxic gas, present and propose the following scheme, including fan cover shell, the circumferential outside of fan cover shell is fixedly connected with exhaust port, the side of fan cover shell air inlet is fixedly connected with the switching box that communicates, switching box is internally provided with air intake switching mechanism for switching air inlet passage, the air intake switching mechanism includes cylinder and baffle, the cylinder is fixedly connected in switching box side, cylinder piston rod one end penetrates switching box and is fixedly connected with baffle, in the utility model, by cylinder drive baffle along guide rail sliding switch air inlet path avoid stoppage of work to cause delay production and filter core adopt the gradient filtration structure of first filter screen, second filter screen, HEPA filter paper, honeycomb charcoal net to remove most air pollution provide workshop air quality.

Description

Technical Field

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

[0002] In modern chemical production processes, equipment is needed to replace the air in the workshop. Since the air quality around the factory is often poor, the air extraction system needs to be designed with corresponding filtration mechanisms to continuously supply clean, fresh air. However, the following problems still exist:

[0003] Traditional equipment requires machine shutdown when the filter element of the filter device is replaced on a regular basis, and the operation of replacing the filter element is complicated, which seriously affects the production schedule.

[0004] Chemical dust has a wide particle size distribution, and single-stage filters cannot intercept ultrafine particles;

[0005] Therefore, a chemical safety ventilation device is proposed. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the need to shut down the machine when the filter element of the traditional equipment needs to be replaced periodically, and the inability of a single-stage filter to intercept ultrafine particles and toxic gases. Therefore, this invention proposes a chemical safety ventilation device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A chemical safety ventilation device includes a fan housing, an exhaust port fixedly connected to the outer circumference of the fan housing, a switching box fixedly connected to one side of the air inlet of the fan housing, an air inlet switching mechanism inside the switching box for switching the air inlet channel, and a filter mechanism on one side of the switching box for filtering impurities in the air.

[0009] The air intake switching mechanism includes a cylinder and a baffle. The cylinder is fixedly connected to one side of the switching box. One end of the cylinder piston rod passes through the switching box and is fixedly connected to the baffle. The baffle slides with the guide rail to switch the air intake path.

[0010] The filtration mechanism includes two air inlet cylinders fixedly connected to the side of the switching box away from the fan housing. The two air inlet cylinders have the same structure. One end of the air inlet cylinder is rotatably connected to a cylinder cover, and the other end of the air inlet cylinder is provided with a step. A filter element is detachably placed inside the air inlet cylinder. One end of the filter element abuts against the step, and the outer diameter of the filter element and the inner diameter of the air inlet cylinder are fitted with a clearance.

[0011] An air intake mechanism is provided on one side of the fan housing for drawing in filtered air.

[0012] In one possible design, the intake mechanism includes a motor fixedly connected to one side of the fan housing, with an impeller fixedly connected to one end of the motor output shaft.

[0013] In one possible design, the outer circumference of the air intake cylinder is provided with multiple square holes for air intake.

[0014] In one possible design, the end of the air intake cylinder has a groove and a threaded hole. A sealing ring is embedded in the groove, and a bolt passes through the cylinder cover and engages with the threaded hole to seal one end of the air intake cylinder.

[0015] In one possible design, the filter element includes a cylindrical honeycomb carbon mesh, with a cylindrical HEPA filter paper, a second filter, and a first filter sequentially fitted around the outer circumference of the honeycomb carbon mesh for multi-stage air filtration.

[0016] In one possible design, bases are fixedly connected to both sides of the fan casing, and resin pads are glued to the bottom of the bases.

[0017] In one possible design, a rain cover is fixedly connected to one side of the fan housing, and the rain cover is located above the air intake.

[0018] In this application:

[0019] Air enters through the square holes in the air intake and passes sequentially through the first filter screen, the second filter screen, the HEPA filter paper, and the honeycomb carbon mesh of the filter element to complete the filtration process.

[0020] The motor drives the impeller to rotate, creating a negative pressure inside the fan casing, which draws in filtered clean air and discharges it into the workshop through the exhaust port.

[0021] When the filter element needs to be replaced, the cylinder drives the push rod, which causes the baffle to slide along the guide rail, cutting off the air passage of the blocked filter cartridge and connecting the spare filter cartridge, thus achieving switching without stopping the machine. After the switching is completed, the bolt is loosened to open the cover of the blocked filter cartridge. After the sealing ring is decompressed, the filter element can be directly extracted for replacement.

[0022] Beneficial effects: In this utility model, the chemical safety ventilation device uses components such as cylinder, baffle, guide rail, and air inlet cylinder in combination. The cylinder drives the baffle to slide along the guide rail to switch the air intake path. The filter element can be replaced without stopping the machine and the time is short, avoiding downtime that would delay production and improving work efficiency.

[0023] In this utility model, a chemical safety ventilation device is used in conjunction with components such as filter element, air inlet cylinder, cylinder cover, and steps. The filter element and air inlet cylinder are fitted with a clearance fit. Combined with the hinge rotation design and single bolt fastening of the air inlet cylinder, the filter element replacement time is greatly shortened and the work efficiency is improved.

[0024] In this utility model, a chemical safety ventilation device is used in conjunction with components such as a first filter screen, a second filter screen, HEPA filter paper, honeycomb carbon mesh, and filter element. The filter element adopts a gradient filtration structure of the first filter screen, the second filter screen, HEPA filter paper, and honeycomb carbon mesh to ensure that most pollutants in the air are filtered out, improve the air quality in the workshop, and help improve the working environment.

[0025] In this invention, the intake path is switched by a cylinder-driven baffle sliding along the guide rail to avoid downtime and production delays. The filter element adopts a gradient filtration structure of first filter screen, second filter screen, HEPA filter paper, and honeycomb carbon mesh to remove most air pollutants and improve the air quality in the workshop. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the first perspective structure of a chemical safety ventilation device proposed in this utility model.

[0027] Figure 2 This is a second-view structural schematic diagram of a chemical safety ventilation device proposed in this utility model.

[0028] Figure 3 This is a schematic cross-sectional view of a chemical safety ventilation device proposed in this utility model.

[0029] Figure 4 This is a second-view cross-sectional structural schematic diagram of a chemical safety ventilation device proposed in this utility model.

[0030] Figure 5 This is a partial structural schematic diagram from a first perspective of a chemical safety ventilation device proposed in this utility model.

[0031] In the diagram: 1. Base; 2. Motor; 3. Fan housing; 4. Exhaust port; 5. Cylinder cover; 6. Rain cover; 7. Air inlet; 701. Step; 8. Cylinder; 9. Switching box; 10. Guide rail; 10. Filter element; 1001. First filter screen; 1002. Second filter screen; 1003. HEPA filter paper; 1004. Honeycomb carbon mesh; 11. Sealing ring; 12. Baffle. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] In one implementation case, refer to Figures 1-5A ventilation device includes: a fan housing 3, an exhaust port 4 fixedly connected to the outer circumference of the fan housing 3, a switching box 9 fixedly connected to one side of the air inlet of the fan housing 3, an air inlet switching mechanism for switching the air inlet channel is provided inside the switching box 9, and a filter mechanism for filtering impurities in the air is provided on one side of the switching box.

[0034] The air intake switching mechanism includes a cylinder 8 and a baffle 12. The cylinder 8 is fixedly connected to one side of the switching box 9. One end of the piston rod of the cylinder 8 passes through the switching box 9 and is fixedly connected to the baffle 12. The baffle 12 slides with the guide rail 901 to switch the air intake path.

[0035] The filtration mechanism includes two air inlet cylinders 7 fixedly connected to the side of the switching box 9 away from the fan housing 3. The two air inlet cylinders 7 have the same structure. One end of the air inlet cylinder 7 is rotatably connected to a cylinder cover 5. The other end of the air inlet cylinder 7 is provided with a step 701. A filter element 10 is detachably placed inside the air inlet cylinder 7. One end of the filter element 10 abuts against the step 701. The outer diameter of the filter element 10 and the inner diameter of the air inlet cylinder 7 are in clearance fit.

[0036] An air intake mechanism is provided on one side of the fan housing 3 for drawing in filtered air;

[0037] The suction mechanism includes a motor 2 fixedly connected to one side of the fan housing 3, and an impeller 13 fixedly connected to one end of the output shaft of the motor 2.

[0038] This application can be used in the field of chemical technology, or in other fields applicable to this application.

[0039] In another implementation case, refer to Figures 1-5 A chemical safety ventilation device, which is applied to the field of chemical technology, has multiple square holes on the outer circumference of the air inlet cylinder 7 for air intake.

[0040] The end of the air inlet cylinder 7 is provided with a groove and a threaded hole. A sealing ring 11 is embedded in the groove. The bolt passes through the cylinder cover 5 and engages with the threaded hole to seal one end of the air inlet cylinder 7.

[0041] The filter element 10 includes a cylindrical honeycomb carbon mesh 1004. Cylindrical HEPA filter paper 1003, a second filter 1002, and a first filter 1001 are sequentially fitted around the outer circumference of the honeycomb carbon mesh 1004 for multi-stage air filtration. The first filter 1001 filters particles with a pore size greater than 2 mm, the second filter 1002 filters dust of 0.5-2 mm, the HEPA filter paper 1003 filters particles of 0.5 μm, and the honeycomb carbon mesh 1004 adsorbs toxic gases in the air and intercepts impurities in the air in stages to improve air quality.

[0042] Both sides of the fan housing 3 are fixedly connected to the base 1. The bottom of the base 1 is glued with a resin pad to reduce vibration with the ground, thereby reducing the noise emitted by the equipment and improving the working environment.

[0043] A rain cover 6 is fixedly connected to one side of the fan housing 3. The rain cover 6 is located above the air inlet cylinder 7 to prevent rainwater from passing through the air inlet cylinder 7 and wetting the filter element 10, thereby affecting the filtration function of the filter element 10.

[0044] However, as is well known to those skilled in the art, the working principles and wiring methods of the motor 2 and the cylinder 8 are commonplace and are all conventional methods or common knowledge. They will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0045] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0046] 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 chemical process safety ventilation device, characterized by, Includes a fan housing (3), an exhaust port (4) is fixedly connected to the outer circumference of the fan housing (3), a switching box (9) is fixedly connected to one side of the air inlet of the fan housing (3), an air inlet switching mechanism is provided inside the switching box (9) for switching the air inlet channel, and a filter mechanism is provided on one side of the switching box (9) for filtering impurities in the air. The intake switching mechanism includes a cylinder (8) and a baffle (12). The cylinder (8) is fixedly connected to one side of the switching box (9). One end of the piston rod of the cylinder (8) passes through the switching box (9) and is fixedly connected to the baffle (12). The baffle (12) slides with the guide rail (901) to switch the intake path. The filtration mechanism includes two air inlet cylinders (7) fixedly connected to the side of the switching box (9) away from the fan housing (3). The two air inlet cylinders (7) have the same structure. One end of the air inlet cylinder (7) is rotatably connected to a cylinder cover (5). The other end of the air inlet cylinder (7) is provided with a step (701). A filter element (10) is detachably placed inside the air inlet cylinder (7). One end of the filter element (10) abuts against the step (701). The outer diameter of the filter element (10) and the inner diameter of the air inlet cylinder (7) are in clearance fit. An air intake mechanism is provided on one side of the fan housing (3) for drawing in filtered air.

2. The chemical safety ventilation device according to claim 1, wherein The air intake mechanism includes a motor (2) fixedly connected to one side of the fan housing (3), and an impeller (13) is fixedly connected to one end of the output shaft of the motor (2).

3. The chemical safety ventilation device of claim 1, wherein, The air intake cylinder (7) has multiple square holes on its outer circumference for air intake.

4. The chemical safety ventilation device of claim 1, wherein, The end of the air inlet cylinder (7) is provided with a groove and a threaded hole. A sealing ring (11) is embedded in the groove. The bolt passes through the cylinder cover (5) and engages with the threaded hole to seal one end of the air inlet cylinder (7).

5. The chemical safety ventilation device of claim 1, wherein, The filter element (10) includes a cylindrical honeycomb carbon mesh (1004), and a cylindrical HEPA filter paper (1003), a second filter (1002), and a first filter (1001) are sequentially sleeved on the outer circumference of the honeycomb carbon mesh (1004) for multi-stage air filtration.

6. The chemical safety ventilation device of claim 1, wherein, The fan casing (3) is fixedly connected to bases (1) on both sides, and a resin pad is glued to the bottom of the base (1).

7. The chemical safety ventilation device of claim 1, wherein, A rain cover (6) is fixedly connected to one side of the fan housing (3), and the rain cover (6) is located above the air inlet cylinder (7).

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