Spark capturing device

Abstract

The utility model discloses a spark catching device which comprises a ventilation pipe, an air inlet reducer pipe is arranged at the air inlet end of the ventilation pipe, an air outlet reducer pipe is arranged at the air outlet end of the ventilation pipe, a plurality of filtering pieces arranged at intervals are further installed in the ventilation pipe, each filtering piece comprises a filtering net, the hole diameter of each filtering net is smaller than 1.5 mm, and each filtering net is provided with a plurality of bent parts. And the ventilation cross section of the filter screen is more than one time of the hot air inlet cross section of the air inlet reducer pipe. The utility model has the beneficial effects that the ventilation cross section of the filter screen is more than one time of the cross section of the hot air inlet of the air inlet reducer pipe, so that the high spark capture effect can be ensured while the ventilation rate is ensured, and the safety of subsequent material drying is improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product drying, and in particular to a spark capture device. Background Technology

[0002] In the field of agricultural product drying, hot air is often used. In a hot air drying environment, cold air passes through a heat exchanger to generate high-temperature hot air. Some material dust may enter the heat exchanger with the air. If the temperature is too high, localized overheating may occur, generating sparks or fires. If these sparks directly enter the dryer, they can easily cause a fire. Spark arrestors can promptly capture and extinguish these sparks, thus eliminating the fire hazard.

[0003] Heat exchangers include, but are not limited to, electric heating and hot air furnaces. Hot air furnaces may also burn out due to long-term use or material corrosion. In this case, fuel dust or sparks may enter the drying chamber with the hot air furnace, thus causing a fire.

[0004] For drying equipment, a fire would cause severe damage, incurring high repair costs and potentially rendering the equipment unusable. Spark arresters indirectly protect the normal operation and lifespan of drying equipment by preventing fires. Regarding personnel safety, fires pose a serious threat to the lives of operators; spark arresters help create a relatively safe drying environment, reducing the risk of injury or death.

[0005] However, it is difficult to achieve a balance between ventilation rate and capture efficiency in existing spark catchers. That is, if the pore size of the filter screen is very small, the spark capture effect can be improved, but the ventilation rate will be reduced, thus affecting the drying of subsequent materials. On the other hand, if the pore size of the filter screen is increased, the ventilation rate is guaranteed, but the capture effect is reduced. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spark capture device that can guarantee both ventilation rate and spark capture effect.

[0007] The purpose of this utility model is achieved through the following technical solution: a spark capture device, including a ventilation pipe, an air inlet reducer pipe at the air inlet end of the ventilation pipe, an air outlet reducer pipe at the air outlet end of the ventilation pipe, and a number of spaced filter elements installed inside the ventilation pipe, the filter elements including a filter screen, the filter screen having a pore size of less than 1.5mm, the filter screen having a number of bends, and the ventilation cross section of the filter screen being more than 1 times the hot air inlet cross section of the air inlet reducer pipe.

[0008] Optionally, the ventilation cross-section of the filter screen is 1.5 to 2 times the hot air inlet cross-section of the inlet reducer.

[0009] Optionally, the filter element also includes a frame, with frames installed on both the left and right ends of the filter screen.

[0010] Optionally, a reinforcing rib is also installed on the inner curved surface of the bend, and the reinforcing rib extends in the left and right direction.

[0011] Optional, there are 2-5 filters.

[0012] Optionally, an ash collector is installed at the bottom of the ventilation duct, and an ash leakage port is also opened at the bottom of the ventilation duct, which is connected to the ash collector.

[0013] Optionally, the top of the ventilation duct has an installation port. The width of the installation port in the left-right direction matches the width of the filter element, and the length of the installation port in the front-back direction matches the distance between the two farthest filter elements. The installation port is equipped with a cover plate, and the inner walls on the left and right sides of the ventilation duct are provided with slots, in which the filter elements are installed.

[0014] Optionally, a flange connection port is provided at the installation port, the cover plate is connected to the flange connection port, and the cover plate is provided with a protrusion that covers the flange connection port.

[0015] The present invention has the following advantages: the spark capture device of the present invention has a filter screen with a ventilation cross section that is more than twice the hot air inlet cross section of the air inlet variable diameter pipe, which can ensure a high spark capture effect while ensuring ventilation rate, thereby improving the safety of subsequent material drying. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 This is a schematic diagram of the filter element.

[0020] Figure 5 This is a partial schematic diagram of the filter element;

[0021] In the diagram, 1-ventilation duct, 2-inlet reducer, 3-outlet reducer, 4-filter element, 5-ash collector, 6-cover plate, 7-slot, 41-frame, 42-filter screen, 43-reinforcing rib, 44-bend. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a spark capture device includes a ventilation pipe 1, an inlet reducer 2 at the inlet end of the ventilation pipe 1, and an outlet reducer 3 at the outlet end of the ventilation pipe 1. In this embodiment, the cross-sections of the ventilation pipe 1, the inlet reducer 2, and the outlet reducer 3 are rectangular. Flanges are provided at the outlet end of the outlet reducer 3 and the inlet end of the inlet reducer 2 for connection to the pipeline. Hot air generated by a heat source is connected to the flange of the inlet reducer 2 through the pipeline, and then the hot air enters the inlet reducer 2, the ventilation pipe 1, and the outlet reducer 3, finally entering the next device from the outlet reducer 3. Further, the flow of the heat source... The direction of movement is forward. The larger end of the inlet reducer 2 is located at the front end, while the larger end of the outlet reducer 3 is located at the rear end. Therefore, when the heat source passes through the inlet reducer 2, its speed will decrease, thereby improving the spark capture rate. When the heat source enters the next device through the outlet reducer 3, it will be accelerated, thus ensuring the efficiency of heat source delivery. In this embodiment, several spaced filters 4 are also installed inside the ventilation pipe 1. Hot air is filtered through the filters 4, thereby capturing sparks. In order to provide a relatively safe heat source for subsequent equipment, it is necessary to improve the spark capture efficiency and capture as many sparks as possible. In this embodiment, such as Figure 4 and Figure 5 As shown, the filter element 4 includes a filter screen 42 with a pore size of less than 1.5 mm. A small pore size allows for better spark capture, but it also affects the overall ventilation efficiency of the filter screen 42, thus impacting the use of subsequent equipment. Therefore, in this embodiment, the filter screen 42 has several bends 44, and its ventilation cross-section is more than twice the size of the hot air inlet cross-section of the inlet reducer 2. During manufacturing, the filter screen 42 can be commercially available, provided its pore size is less than 1.5 mm. Then, the filter... The filter screen 42 is formed by repeated folding or pressing, resulting in several bends 44. The cross-section of the filter screen 42 has a sawtooth-like structure, thus giving it a large ventilation cross-section. This means that the ventilation cross-section of the filter screen 42 is more than twice the size of the hot air inlet cross-section of the air inlet reducer 2, ensuring ventilation efficiency and effectively reducing wind speed while improving capture efficiency. Furthermore, the ventilation cross-section of the filter screen 42 is 1.5 to 2 times the size of the hot air inlet cross-section of the air inlet reducer 2, ensuring both ventilation rate and spark capture rate.

[0029] In this embodiment, as Figure 4 and Figure 5As shown, the filter element 4 also includes a frame 41. The left and right ends of the filter screen 42 are equipped with the frame 41. The frame 41 and the filter element 4 can be connected by spot welding, that is, the top of the bent part 44 is welded to the frame 41. The frame 41 ensures the structural strength of the filter element 4. Furthermore, a reinforcing rib 43 is installed on the inner curved surface of the bent part 44. The reinforcing rib 43 extends in the left and right direction, which further improves the structural strength of the filter element 4, thereby facilitating the installation and cleaning of the filter element 4. Of course, during manufacturing, the upper and lower ends of the filter screen 42 can also be provided with the frame 41, so that the filter screen 42 is provided with a rectangular frame 41.

[0030] In this embodiment, as Figure 3 As shown, there are 2 to 5 filter elements 4. Each time a heat source passes through a filter element 4, an additional stage of spark capture is added. In other words, if there are two filter elements 4, the spark capture device is a two-stage spark capture device; if there are five filter elements 4, the spark capture device is a five-stage spark capture device. Through multi-stage capture, the spark capture efficiency is further improved.

[0031] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, an ash collector 5 is installed at the bottom of the ventilation pipe 1, and an ash leakage port is also provided at the bottom of the ventilation pipe 1. The ash leakage port is connected to the ash collector 5, and the collected sparks can fall into the ash collector 5 through the ash leakage port. However, in actual use, the captured sparks vary in size. Large sparks can easily fall into the ash collector 5 through the ash leakage port, but small sparks may be adsorbed on the filter screen 42. After long-term use, the sparks adhering to the filter screen 42 will affect the ventilation cross-section of the filter screen 42, thereby affecting its ventilation rate. Therefore, the filter screen 42 needs to be cleaned, and it also needs to be replaced when it is damaged. Therefore, in this embodiment, an installation port is provided at the top of the ventilation pipe 1. The width of the installation port in the left-right direction matches the width of the filter element 4, and the length of the installation port in the front-back direction is... The spacing between the two furthest filter elements 4 is matched to facilitate the installation of the filter screen 42. The installation port is provided with a cover plate 6, and the inner walls of the left and right sides of the ventilation pipe 1 are provided with slots 7. The filter element 4 is installed in the corresponding slot 7. Preferably, the slot 7 is a U-shaped slot. During installation, the cover plate 6 is opened, and the operator can easily see the location of the slot 7. Then, the prepared filter element 4 can be directly inserted into the corresponding slot 7. During disassembly, the filter element 4 can be simply removed from the corresponding slot 7, which makes the filter element 4 easy to install and remove. Furthermore, a flange connection port is provided at the installation port. The cover plate 6 is connected to the flange connection port, and the cover plate 6 is provided with a protrusion that covers the flange connection port. By covering the flange connection port with the protrusion, the heat source can only be transported through the filter element 4, thereby ensuring the spark capture effect.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spark catching device comprising a ventilation pipe, an air inlet variable-diameter pipe is arranged at an air inlet end of the ventilation pipe, an air outlet variable-diameter pipe is arranged at an air outlet end of the ventilation pipe, and a plurality of filter members are arranged at intervals in the ventilation pipe, characterized in that: The filter element comprises a filter screen with a pore size less than 1.5 mm, the filter screen has several bending parts, and the ventilation section of the filter screen is more than 1 times of the hot air inlet section of the air inlet reducer pipe.

2. A spark trap according to claim 1, wherein: The ventilation section of the filter screen is 1.5-2 times of the hot air inlet section of the air inlet reducer pipe.

3. A spark trap according to claim 1, wherein: The filter element further comprises a frame, and the left and right ends of the filter screen are both provided with the frame.

4. A spark trap according to claim 3, wherein: The inner bending surface of the bending part is further provided with a reinforcing rib, and the reinforcing rib extends in the left-right direction.

5. A spark trap according to claim 4, wherein: The filter element is 2-5.

6. A spark trap according to claim 1, wherein: The bottom of the ventilation pipe is provided with an ash collector, and the bottom of the ventilation pipe is further provided with an ash leakage opening, which is in communication with the ash collector.

7. A spark trap as claimed in any one of claims 1 to 6, wherein: The top of the ventilation pipe is provided with a mounting opening, the width of the mounting opening in the left-right direction matches the width of the filter element, the length of the mounting opening in the front-rear direction matches the interval of the two farthest filter elements, the mounting opening is provided with a cover plate, the left and right inner walls of the ventilation pipe are provided with clamping grooves, and the filter element is mounted in the corresponding clamping groove.

8. A spark trap according to claim 7, wherein: The mounting opening is provided with a flange connecting opening, the cover plate is connected with the flange connecting opening, the cover plate is provided with a convex part, and the convex part covers the flange connecting opening.

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