Explosion-proof air electric heater

Abstract

The utility model relates to an explosion-proof type air electric heater, which belongs to the technical field of air electric heaters and comprises an electric heater main body, an air guide fan, a dust filtering box body, a dust filtering frame and two plate-type dust removing filter elements, the electric heater main body, the air guide fan and the dust filtering box body are communicated in sequence, the electric heater main body is provided with an electric heating element, and the plate-type dust removing filter elements are arranged on the air guide fan. The two plate-type dust removal filter elements are connected with the dust filtration frame through screws, and the two dust removal filter elements of the dust filtration frame in the dust filtration box body can be recycled to filter passing air. The electric heater box adopting the three-layer structural design meets the anti-explosion requirement and is suitable for the dangerous environment, online replacement of the filter elements can be achieved through the double-filter-element frame and the hydraulic push-out mechanism, airflow keeps running through the standby filter elements during maintenance, the states of the filter elements are monitored in real time through the differential pressure sensor, and manual misjudgment is avoided.

Description

Technical Field

[0001] This utility model relates to the field of air electric heater technology, and in particular to an explosion-proof air electric heater. Background Technology

[0002] An air heater is a device that directly converts electrical energy into heat energy to heat flowing air. It is a very common heating element in industrial processes, HVAC, and many other applications that require heated air. Current flows through the heating element, which has high resistance characteristics. A fan or blower forces air to flow over or blow across the surface of these hot heating elements. Heat is transferred from the heating element to the flowing air through forced convection, thereby heating the air to the required temperature.

[0003] A search revealed that Chinese patent CN202122397850.8 discloses an explosion-proof electric air heater for organic waste gas. When the filter screen of the filter section needs to be replaced after long-term use, the controller sends a signal to the drive component, which drives the clamping mechanism to loosen the filter screen and then pull it out of the slot in the filter section. When replacing the filter screen, the filter screen is inserted into the filter section, and the drive component drives the clamping mechanism to clamp and fix the filter screen. This facilitates the rapid replacement of the filter screen, maintains stable air supply efficiency, saves time and effort, and is highly practical.

[0004] The above-mentioned technical solutions have the following drawbacks. Although the explosion-proof air heater can facilitate quick replacement of the filter through the filter removal and installation structure to ensure stable air supply efficiency and prevent filter blockage that could cause the airflow to drop below the set air volume and lead to overheating and potential explosion, the filter can only be replaced after the machine is stopped in actual use, which affects the efficiency of use. Therefore, an explosion-proof air heater is proposed that allows the filter to be cleaned without stopping the machine, thereby ensuring stable air supply and improving explosion-proof performance.

[0005] In view of this, this work improves and solves the above problems. Through dedicated research and application of theoretical principles, a technical solution with a reasonable design that can effectively improve the above defects has finally been proposed.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] This utility model provides an explosion-proof air electric heater, which solves the problem that traditional air electric heaters require stopping the machine for disassembly and assembly when cleaning clogged dust. It is equipped with a circulating filter structure driven by a hydraulic cylinder, which can ensure that the filter can be removed for cleaning without stopping the machine, preventing the risk of overheating and explosion caused by low airflow due to filter clogging.

[0008] The present invention provides the following solution to the above-mentioned technical problems: an explosion-proof air electric heater, comprising an electric heater body, an air guide fan, a dust filter box, a dust filter frame, and a plate-type dust collector filter element. The electric heater body, the air guide fan, and the dust filter box are connected in sequence. The electric heater body is provided with an electric heating element. Two plate-type dust collector filters are provided, and the two plate-type dust collector filters are connected to the dust filter frame by screws. The two dust collector filters of the dust filter frame inside the dust filter box can be used repeatedly to filter the passing air.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the dust filter box is provided with a storage compartment and an equipment compartment. The plate dust collector filter element on one side is stored in the storage compartment. The equipment compartment is equipped with a hydraulic cylinder and a hydraulic pump station. The hydraulic pump station can drive the hydraulic cylinder to extend and retract, thereby causing the plate dust collector filter element to slide and adjust its position within the dust filter box.

[0011] Furthermore, both the storage compartment and the equipment compartment are equipped with maintenance doors. The drive end of the hydraulic cylinder is fixedly connected to the dust filter frame, allowing for the maintenance, disassembly, and replacement of the internal equipment through the maintenance doors.

[0012] Furthermore, a positioning track is installed inside the dust filter box, and a limit slider and an auxiliary pulley are fixedly installed on the dust filter frame corresponding to the positioning track. The limit slider and the auxiliary pulley can limit the dust filter frame, so that the dust filter frame can slide stably inside the dust filter box.

[0013] Furthermore, a sealing plate is fixedly installed on the dust filter frame, and a sealing frame is provided on the dust filter box corresponding to the sealing plate. A sealing ring is provided inside the sealing frame so that the sealing plate can be sealed through the sealing frame.

[0014] Furthermore, the dust filter box is equipped with a dust discharge hopper, which is connected to a discharge valve, through which the dust and debris collected in the dust discharge hopper can be discharged.

[0015] Furthermore, the outer wall layer of the electric heater body is made of 304 stainless steel, the inner layer is made of pressure-resistant cast aluminum with a wall thickness of ≥12mm and an internal pressure bearing capacity of ≥1.5MPa. A 25-30mm interlayer is formed between the outer and inner layers and filled with ceramic fiber fireproof cotton.

[0016] Furthermore, both the dust filter housing and the electric heater body are equipped with differential pressure wind speed and air volume sensors, which can monitor the wind pressure before and after the filter.

[0017] This utility model provides an explosion-proof air electric heater, which has the following advantages:

[0018] 1. The electric heater housing with a three-layer structure design meets explosion-proof requirements and is suitable for hazardous environments. The filter element can be replaced online through a double filter element frame and hydraulic ejection mechanism. During maintenance, the airflow is maintained through the spare filter element. The filter element status is monitored in real time through a differential pressure sensor to avoid human misjudgment.

[0019] 2. The configuration of the track-slider-pulley system ensures that the filter frame moves smoothly without jamming, and the dust hopper collects impurities in a concentrated manner, reducing the load on the filter element. Hot-swap replacement and maintenance can be completed on-site within 5 minutes without cutting off the power or airflow.

[0020] 3. It solves the problem that traditional air heaters require stopping the machine for disassembly and assembly when cleaning clogged dust. It is equipped with a circulating filter structure driven by a hydraulic cylinder, which can remove the filter for cleaning without stopping the machine. This prevents the airflow from being too low due to filter blockage, which could lead to overheating and explosion. This further improves the safety of the air heater during use.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of an explosion-proof air electric heater according to an embodiment of the present invention;

[0024] Figure 2 A front view of an explosion-proof air electric heater provided in an embodiment of this utility model;

[0025] Figure 3 This is a side view of the dust filter box in an explosion-proof air electric heater according to an embodiment of the present invention.

[0026] Figure 4This is a top view structural diagram of the dust filter box in an explosion-proof air electric heater according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a dust filter frame in an explosion-proof air electric heater according to an embodiment of the present invention;

[0028] Figure 6 A side view of an explosion-proof air electric heater provided in an embodiment of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the electric heater body in an explosion-proof air electric heater according to an embodiment of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Electric heater body; 2. Air guide fan; 3. Dust filter box; 4. Electric heating element; 5. Dust filter frame; 6. Plate dust collector filter element; 7. Storage bin; 8. Equipment bin; 9. Hydraulic cylinder; 10. Hydraulic pump station; 11. Positioning track; 12. Limit slider; 13. Auxiliary pulley; 14. Sealing plate; 15. Sealing frame; 16. Dust discharge hopper; 17. Discharge valve; 18. Inspection door; 19. Differential pressure wind speed and air volume sensor. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-7 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0033] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] like Figure 1 , 2 As shown in Figure 7, an explosion-proof air electric heater includes an electric heater body 1, an air guide fan 2, a dust filter box 3, a dust filter frame 5, and a plate dust collector filter element 6. The electric heater body 1, the air guide fan 2, and the dust filter box 3 are connected in sequence. The electric heater body 1 is equipped with an electric heating element 4. There are two plate dust collector filters 6, which are connected to the dust filter frame 5 by screws. The two dust collector filters 6 in the dust filter frame 5 inside the dust filter box 3 can be used repeatedly to filter the passing air. The outer wall layer of the electric heater body 1 is made of 304 stainless steel, and the inner layer is made of pressure-resistant cast aluminum with a wall thickness ≥12mm and an internal pressure bearing capacity ≥1.5MPa. A 25-30mm sandwich layer is formed between the outer and inner layers and filled with ceramic fiber fireproof cotton. Both the dust filter box 3 and the electric heater body 1 are equipped with differential pressure wind speed and air volume sensors 19, which can monitor the wind pressure before and after the filter screen.

[0036] like Figure 3 As shown, the dust filter box 3 is equipped with a storage compartment 7 and an equipment compartment 8. The plate dust collector filter element 6 on one side is stored in the storage compartment 7. The equipment compartment 8 is equipped with a hydraulic cylinder 9. The hydraulic cylinder 9 is equipped with a hydraulic pump station 10. The hydraulic pump station 10 can drive the hydraulic cylinder 9 to extend and retract, thereby causing the plate dust collector filter element 6 to slide and adjust its position within the dust filter box 3.

[0037] like Figure 4 As shown, both the storage compartment 7 and the equipment compartment 8 are equipped with inspection doors 18. The drive end of the hydraulic cylinder 9 is fixedly connected to the dust filter frame 5. The internal equipment can be inspected, disassembled, and replaced through the inspection doors 18.

[0038] like Figure 5 As shown, a positioning track 11 is installed inside the dust filter box 3. A limit slider 12 and an auxiliary pulley 13 are fixedly installed on the dust filter frame 5 corresponding to the positioning track 11. The limit slider 12 and the auxiliary pulley 13 can limit the dust filter frame 5, so that the dust filter frame 5 can slide stably inside the dust filter box 3. A sealing plate 14 is fixedly installed on the dust filter frame 5. A sealing frame 15 is provided on the dust filter box 3 corresponding to the sealing plate 14. A sealing rubber ring is provided inside the sealing frame 15, so that the sealing plate 14 can be sealed through the sealing frame 15.

[0039] like Figure 6As shown, the dust filter box 3 is equipped with a dust discharge hopper 16, and the dust discharge hopper 16 is connected to a discharge valve 17, through which the dust and debris collected in the dust discharge hopper 16 can be discharged.

[0040] The specific working principle and usage method of this utility model are as follows: the electric heater body 1, the air guide fan 2, and the dust filter box 3 are connected in sequence. The air guide fan 2 can draw air into the electric heater body 1 through the dust filter box 3. The electric heating element 4 can heat the air that is introduced, so that the heated air can be discharged from the electric heater body 1.

[0041] A plate-type dust collector filter element 6 in the dust filter frame 5 filters the incoming air. Unattached dust and impurities are collected in the dust discharge hopper 16 and discharged by opening the discharge valve 17. The differential pressure wind speed and air volume sensor 19 detects the airflow pressure difference on both sides of the plate-type dust collector filter element 6. If the pressure difference is too large or the airflow into the electric heater body 1 is low, it indicates that the plate-type dust collector filter element 6 is heavily clogged and needs cleaning. Remove the screws connecting the sealing plate 14 to the dust collector box 3, and the hydraulic cylinder 9 can be used to clean one side of the plate-type dust collector filter element. The filter element 6 is pushed out from the dust collection box 3. The limiting slider 12 and the auxiliary pulley 13 can slide in the positioning track 11, so that the dust collection frame 5 can move smoothly. The staff can then disassemble, replace or clean the discharged plate dust collector filter element 6. The spare plate dust collector filter element 6 stored in the storage compartment 7 can be used to filter the passing air. The plate dust collector filter element 6 in the storage compartment 7 can be disassembled and maintained by opening the maintenance door 18. The maintenance process does not require stopping the air electric heater.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An explosion-proof air electric heater, comprising an electric heater body (1), an air guide fan (2), a dust filter box (3), a dust filter frame (5), and a plate-type dust collector filter element (6), characterized in that: The electric heater body (1), the air guide fan (2), and the dust filter box (3) are connected in sequence. The electric heater body (1) is provided with an electric heating element (4). There are two plate dust collector filter elements (6). The two plate dust collector filter elements (6) are connected to the dust filter frame (5) by screws. The two dust collector filter elements (6) of the dust filter frame (5) in the dust filter box (3) can be used repeatedly to filter the passing air.

2. The explosion-proof air electric heater according to claim 1, characterized in that, The dust filter box (3) is provided with a storage compartment (7) and an equipment compartment (8). The plate dust filter element (6) on one side is stored in the storage compartment (7). The equipment compartment (8) is equipped with a hydraulic cylinder (9). The hydraulic cylinder (9) is equipped with a hydraulic pump station (10).

3. The explosion-proof air electric heater according to claim 2, characterized in that, Both the storage compartment (7) and the equipment compartment (8) are equipped with inspection doors (18), and the drive end of the hydraulic cylinder (9) is fixedly connected to the dust filter frame (5).

4. The explosion-proof air electric heater according to claim 1, characterized in that, The dust filter box (3) is equipped with a positioning track (11), and the dust filter frame (5) is fixedly installed with a limit slider (12) and an auxiliary pulley (13) corresponding to the positioning track (11).

5. The explosion-proof air electric heater according to claim 1, characterized in that, The dust filter frame (5) is fixedly installed with a sealing plate (14), and the dust filter box (3) is provided with a sealing frame (15) corresponding to the sealing plate (14), and a sealing ring is provided inside the sealing frame (15).

6. The explosion-proof air electric heater according to claim 1, characterized in that, The dust filter box (3) is equipped with a dust discharge hopper (16), and the dust discharge hopper (16) is connected to a discharge valve (17).

7. The explosion-proof air electric heater according to claim 1, characterized in that, The outer wall of the electric heater body (1) is made of 304 stainless steel, the inner wall is made of pressure-resistant cast aluminum, the wall thickness is ≥12mm, the internal pressure bearing capacity is ≥1.5MPa, and a 25-30mm interlayer is formed between the outer and inner layers, which is filled with ceramic fiber fireproof cotton.

8. The explosion-proof air electric heater according to claim 1, characterized in that, The dust filter box (3) and the electric heater body (1) are both equipped with differential pressure wind speed and air volume sensors (19).

Images